New York attorneys Osnato, Christopher John to O’Sullivan, Patrick John
By surname, as the register spells it
- Attorneys
- 300
- Register file
- Sep 29, 2026
300 living attorneys on the register file of Sep 29, 2026, part 20 of 23 of the O surnames. Each row is the register's record: the registration number, the year admitted, the status, the office and the employer. 81 link to a page of their own.
Osnato, Christopher John to O’Sullivan, Patrick John
| Attorney | Registration No. | Admitted | Status | Office | Employer | Law school |
|---|---|---|---|---|---|---|
| Christopher John Osnato | 5727656 | 2020 | Due to re‑register | Scarsdale, NY | Pawlicy Advisor, Inc. | Boston College Law School |
| John Edward Osnato | 1552330 | 1974 | Delinquent | Brooklyn, NY | Law Office of John E. Osnato | Fordham University School of Law |
| Michael J. Osnato | 2925089 | 1998 | Currently registered | New York, NY | Simpson Thacher & Bartlett LLP | Fordham University School of Law |
| Miriam Elizabeth Osner | 4616348 | 2008 | Currently registered | San Jose, CA | Office of the County Counsel, County of Santa Clara | Columbia Law School |
| Jean Helen Osnos | 2706570 | 1995 | Currently registered | New York, NY | Harmon, Linder & Rogowsky | Seton Hall University School of Law |
| Mark A. Osnowitz | 2092401 | 1987 | Currently registered | Kew Gardens, NY | Queens County District Attorney | Maurice A. Deane School of Law at Hofstra University |
| Matthew A. Osnowitz | 6008379 | 2023 | Currently registered | Columbia Law School | ||
| Stella Olufunmilola Osoba | 2887917 | 1998 | Currently registered | New York, NY | Dotdashmeredith | University of Warwick School of Law |
| Ayomide Folasade Osobamiro | 6160089 | 2024 | Due to re‑register | New York University School of Law | ||
| Olatubosun O. Osofisan | 2841401 | 1998 | Due to re‑register | North Greenbush, NY | Law Office of ’tubosun Osofisan | |
| Emily Ann Osofsky | 5888136 | 2021 | Currently registered | New York, NY | Blank Rome LLP | American University Washington College of Law |
| Herman Osofsky | 2047470 | 1986 | Resigned | Rutgers Law School | ||
| Larry Charles Osofsky | 1816123 | 1982 | Currently registered | New York Law School | ||
| Richard Alan Osofsky | 1770940 | 1970 | Currently registered | Pine Plains, NY | Richard Osofskyesq | New York University School of Law |
| Daniel J. Osojnak | 2095438 | 1987 | Currently registered | Hempstead, NY | Daniel J Osojnak Esq | Maurice A. Deane School of Law at Hofstra University |
| Darryl John Osojnak | 2801066 | 1997 | Suspended, delinquent | New York, NY | Fitch Ibca, Inc. | New York Law School |
| David James Osojnak | 2809721 | 1997 | Delinquent | New York Law School | ||
| Elisa Osores Namihas | 4353405 | 2005 | Delinquent | Santiago, Chile | De Bracamonte, Haaker Y Castellares Abogados | Columbia Law School |
| Ayisha N. Osori | 3006160 | 2000 | Suspended, delinquent | New York, NY | Levin & Srinivasan LLP | Harvard Law School |
| Brenda Therese Osorio | 5538335 | 2017 | Currently registered | Albany Law School | ||
| Edgar Steve Osorio | 5693254 | 2019 | Currently registered | Ronkonkoma, NY | Zwaik, Gilbert & Associates | Brooklyn Law School |
| Gladys Nathalia Osorio | 4487765 | 2007 | Currently registered | New York, NY | Cahill Gordon & Reindel LLP | Boston University School of Law |
| Ivette Karen Osorio | 5748280 | 2020 | Currently registered | Bay Shore, NY | The Osorio Law Firm, PLLC | Touro University Jacob D. Fuchsberg Law Center |
| Jessica Nicole Osorio | 5803226 | 2020 | Currently registered | Boca Raton, FL | The One Family Law PLLC | Maurice A. Deane School of Law at Hofstra University |
| Lisa S. Osorio | 4067955 | 2002 | Due to re‑register | Brooklyn, NY | NYC Department of Finance Office of Legal Affairs | Ohio State University Moritz College of Law |
| Ruben Osorio | 4740726 | 2009 | Currently registered | Rock Tavern, NY | Rutgers Law School | |
| Francisco Adolfo Osorio-Diaz | 6165435 | 2024 | Currently registered | Houston, TX | One Allen Center, 500 Dallas Street | |
| Carmen Maria Pina Osorio-Rodrigues | 5107172 | 2013 | Delinquent | Berlin, Germany | Freshfields Bruckhaus Deringer LLP | Emory University School of Law |
| Wilson Rafael Osorio Sierra | 5314729 | 2015 | Currently registered | Alexandria, VA | American University Washington College of Law | |
| Andres Osornio Ocaranza | 5194030 | 2013 | Currently registered | New York, NY | Milbank LLP | Duke University School of Law |
| Mongina Mutile Osoro | 6167019 | 2024 | Currently registered | White Plains, NY | Silverman & Associates | Duke University School of Law |
| Brandon Charles Osowski | 6055362 | 2023 | Currently registered | New York, NY | Vinson & Elkins LLP | University of Virginia School of Law |
| Kaydi Leigh Osowski | 5003603 | 2012 | Currently registered | Burbank, CA | The Walt Disney Company | New York Law School |
| Kevin Osowski | 4927893 | 2011 | Currently registered | New York, NY | Securities and Exchange Commission | New York University School of Law |
| Michael Joseph Osowski | 2473981 | 1992 | Suspended, delinquent | Southbridge, MA | Michael J Osowski Attorney at Law | Albany Law School |
| Leonard Ospina | 2930899 | 1999 | Currently registered | Briarcliff Manor, NY | Law Office of Leonard Ospina | Maurice A. Deane School of Law at Hofstra University |
| Adriana Ospinalara | 2124386 | 1987 | Currently registered | Harvard Law School | ||
| Peter Joseph Osredkar | 3056579 | 2000 | Disbarred | Syracuse University College of Law | ||
| Arona Tova Osrin | 4201927 | 2004 | Due to re‑register | Columbia Law School | ||
| Cristian Alejandro Ossa | 5546148 | 2017 | Currently registered | Metuchen, NJ | Wolfe Ossa Law | Rutgers Law School |
| Edwin A. Ossa | 3990322 | 2001 | Currently registered | New York, NY | Barry McTiernan & Moore | St. John’s University School of Law |
| Siara Elana Ossa | 5877295 | 2022 | Due to re‑register | Long Beach, NY | The Law Office of Siara Ossa PLLC | Touro University Jacob D. Fuchsberg Law Center |
| Maria Leticia Ossa Daza | 4842506 | 2010 | Currently registered | New York, NY | Paul, Weiss, Rifkind, Wharton & Garrison LLP | Fordham University School of Law |
| Michael Ossei-Appau | 5454905 | 2016 | Currently registered | Queen Mary University of London School of Law | ||
| Eric Douglas Ossentjuk | 4112173 | 2003 | Currently registered | Syracuse, NY | National Grid | Elisabeth Haub School of Law at Pace University |
| Eric Kenneth Osserman | 1974500 | 1985 | Currently registered | Georgetown University Law Center | ||
| Christina Sophia Ossi | 2172112 | 1988 | Currently registered | New York, NY | Division of Housing & Community Renewal | Maurice A. Deane School of Law at Hofstra University |
| Brian Paul Ossias | 2724771 | 1996 | Currently registered | Albany, NY | New York State Public Service Commission | Albany Law School |
| Uldarico Ossio Seminario | 5791090 | 2020 | Delinquent | Sao Paulo, Brazil | Brookfield Asset Management | Columbia Law School |
| Jonathan Joseph Ossip | 5391727 | 2016 | Currently registered | Washington, DC | Financial Industry Regulatory Authority | New York University School of Law |
| Adil Ossipov | 6189260 | 2024 | Currently registered | Chicago-Kent College of Law | ||
| Anthony Osso | 1864412 | 1983 | Currently registered | Houston, TX | Anthony Osso | South Texas College of Law Houston |
| David Andre Osso | 4025342 | 2002 | Currently registered | Orlando, FL | Benjamin N. Cardozo School of Law, Yeshiva University | |
| William David Ossoff | 5960760 | 2022 | Currently registered | Harvard Law School | ||
| Andre Acka Ossohou | 4189486 | 2003 | Currently registered | New York, NY | Law Office of Andre A. Ossohou, Esq. | Columbia Law School |
| Marquez Osson | 4013546 | 2002 | Due to re‑register | Temple University Beasley School of Law | ||
| Ronald Edmond Osson | 2078780 | 1986 | Currently registered | Brooklyn, NY | University at Buffalo School of Law (SUNY) | |
| Kristina Osswald | 4978680 | 2011 | Currently registered | Georgetown University Law Center | ||
| William Gerard Osta | 2361913 | 1990 | Currently registered | Elisabeth Haub School of Law at Pace University | ||
| Karen Ostad | 2250256 | 1989 | Currently registered | Roslyn Heights, NY | Ostad PLLC | New York Law School |
| William Samuel Ostan | 1655497 | 1980 | Due to re‑register | University of Toledo College of Law | ||
| Lilia M. Ostapenko | 4351987 | 2005 | Currently registered | Washington, DC | Covington & Burling LLP | Georgetown University Law Center |
| Lior Ostashinsky | 4842522 | 2010 | Suspended, delinquent | |||
| James Leon Ostaszewski | 4852851 | 2010 | Currently registered | Brooklyn, NY | New York State Senate | Brooklyn Law School |
| Henry Dean Ostberg | 3606571 | 1951 | Due to re‑register | Alpine, NJ | Admar Group | New York Law School |
| Karen Ann Myszka Ostberg | 5015763 | 2012 | Currently registered | Westtown, NY | Minisink Town Justice | Widener University School of Law |
| Mary Cristina Ostberg | 5238365 | 2014 | Due to re‑register | New York, NY | New York County District Attorney’s Office | Harvard Law School |
| Alanna Ruth Ostby | 5975651 | 2022 | Currently registered | Arizona State University Sandra Day O’Connor College of Law | ||
| David Robert O’Steen | 5337100 | 2015 | Currently registered | Miami, FL | Assouline & Berlowe | Georgetown University Law Center |
| Laura Ann O’Steen | 4958419 | 2011 | Currently registered | Arizona State University Sandra Day O’Connor College of Law | ||
| Matthew Barry Osten | 5044656 | 2012 | Due to re‑register | McGill University Faculty of Law | ||
| Helen Lisbeth Ostenberg | 1998822 | 1985 | Delinquent | Brooklyn Law School | ||
| Friedrich Ostendorf | 5254263 | 2014 | Due to re‑register | University of Virginia School of Law | ||
| Thomas Alan Ostendorp | 5178843 | 2013 | Currently registered | New York, NY | Kma Zuckert LLP | Brooklyn Law School |
| Paul Ostensen | 3908506 | 2000 | Currently registered | New York, NY | Kelley Drye & Warren LLP | Brooklyn Law School |
| Allan J. Oster | 2262095 | 1989 | Currently registered | Columbus, OH | Nationwide Financial Services, Inc. | Boston University School of Law |
| Amy Gail Oster | 5570205 | 2018 | Due to re‑register | New York, NY | Lendlease | Harvard Law School |
| Barry Andrew Oster | 1638295 | 1979 | Currently registered | University at Buffalo School of Law (SUNY) | ||
| Bernard Oster | 1717255 | 1981 | Due to re‑register | Brooklyn Law School | ||
| Christopher Rush Oster | 2999365 | 1999 | Currently registered | Philadelphia, PA | Cbre | Washington University in St. Louis School of Law |
| Ellen Oster | 2251957 | 1989 | Currently registered | Fordham University School of Law | ||
| Ellis Michael Oster | 4462883 | 2007 | Currently registered | New York, NY | Hinshaw & Culbertson LLP | Cornell Law School |
| Eric G. Oster | 2148559 | 1984 | Disbarred | St. John’s University School of Law | ||
| Jeffrey B. Oster | 2109569 | 1987 | Currently registered | Rutgers Law School | ||
| John Fair Oster | 5038393 | 2012 | Currently registered | New York, NY | American Express | New York University School of Law |
| Jonathan Charles Oster | 1078849 | 1978 | Resigned | St. John’s University School of Law | ||
| Kim Oster | 1216563 | 1977 | Currently registered | Albany Law School | ||
| Matthew Oster | 6197636 | 2025 | Currently registered | St. John’s University School of Law | ||
| Sean Bradford Oster | 4385449 | 2006 | Currently registered | Brooklyn, NY | Kings County Family Court, Triage Part | CUNY School of Law |
| Shari G. Oster | 2076511 | 1985 | Currently registered | St. John’s University School of Law | ||
| Spencer Maxwell Oster | 4281465 | 2004 | Currently registered | New York, NY | Spencer Oster | St. John’s University School of Law |
| Anna Elizabeth Osterberg | 2721082 | 1996 | Resigned | Vermont Law and Graduate School | ||
| Eric Charles Osterberg | 2571099 | 1993 | Currently registered | Boston, MA | Dilworth Ip, LLC | Emory University School of Law |
| William M. Osterbrock | 5549985 | 2017 | Currently registered | Atlanta, GA | Osterbrock & Associates, LLC | Syracuse University College of Law |
| Raymond Charles Osterbye | 4092706 | 2002 | Suspended, due to re‑register | Brooklyn Law School | ||
| Ann Patrice Osterdale | 1814607 | 1982 | Due to re‑register | University of Michigan Law School | ||
| Arlene Susan Osterer | 1055300 | 1978 | Delinquent | St. John’s University School of Law | ||
| Mary Beth Gerard Oster-Erlichman | 2244614 | 1989 | Currently registered | Albany Law School | ||
| Douglas James Osterhoudt | 4902649 | 2011 | Currently registered | Concord, NH | NH Office of Legislative Services | University of New Hampshire Franklin Pierce School of Law |
| Jessica Avery Osterhoudt | 4881199 | 2011 | Currently registered | Laconia, NH | NMB Technologies Corporation | University of New Hampshire Franklin Pierce School of Law |
| Courtny John Osterling | 4893582 | 2011 | Currently registered | White Plains, NY | Grievance Committee for the Ninth Judicial District, Appellate Division, Second Department | Syracuse University College of Law |
| Jessica Taylor Osterlof | 6293674 | 2025 | Currently registered | Newark, NJ | McCarter & English LLP | Seton Hall University School of Law |
| Avraham Reuven Osterman | 4709291 | 2009 | Currently registered | Duke University School of Law | ||
| Brian Scott Osterman | 4998357 | 2012 | Currently registered | Denver, CO | Wheeler Trigg O’Donnell | Notre Dame Law School |
| David S. Osterman | 2287696 | 1989 | Currently registered | Princeton, NJ | George Washington University Law School | |
| Diana Lynn Osterman | 2816536 | 1997 | Currently registered | New York, NY | Goetz, Schenker, Blee & Wiederhorn | University at Buffalo School of Law (SUNY) |
| Jeffrey David Osterman | 2720837 | 1996 | Currently registered | New York, NY | Paul, Weiss, Rifkind, Wharton & Garrison LLP | Harvard Law School |
| Lawrence Jay Osterman | 2036424 | 1986 | Suspended, delinquent | Fordham University School of Law | ||
| David Michael Ostermann | 5990254 | 2022 | Currently registered | New York, NY | Willkie Farr & Gallagher LLP | University of Pennsylvania Carey Law School |
| Gregory Ostermann | 1111467 | 1979 | Due to re‑register | Western New England University School of Law | ||
| John Eugene Ostermann | 1286327 | 1974 | Due to re‑register | Fordham University School of Law | ||
| Mary Elisabeth Ann Ostermann | 3016581 | 2000 | Currently registered | Mineola, NY | Equal Employment Opportunity Office Human Resources Nassau County | |
| Adam John Ostermeier | 5967633 | 2022 | Currently registered | Mississauga Ontario, Canada | Pallett Valo LLP | University of Detroit Mercy School of Law |
| David Spencer Ostern | 5856679 | 2021 | Currently registered | New York, NY | Seyfarth Shaw LLP | Benjamin N. Cardozo School of Law, Yeshiva University |
| Thomas Gerard Osterndorf | 1941277 | 1984 | Currently registered | New Canaan, CT | Fordham University School of Law | |
| William Patrick Osterndorf | 1862044 | 1983 | Currently registered | New Canaan, CT | William P Osterndorf Esq | Fordham University School of Law |
| Mickey H. Osterreicher | 2938678 | 1999 | Currently registered | Buffalo, NY | Finnerty Osterreicher & Abdulla | University at Buffalo School of Law (SUNY) |
| Christina Ostertag | 4299897 | 2005 | Currently registered | Frankfurt, Germany | Hyundai Capital Bank Europe GMBH | Benjamin N. Cardozo School of Law, Yeshiva University |
| Douglas Ostertag | 4311981 | 2005 | Currently registered | University of Texas School of Law | ||
| Elizabeth Marie Ostertag | 6279293 | 2026 | Currently registered | University of Pennsylvania Carey Law School | ||
| Juergen R. Ostertag | 2966117 | 1999 | Currently registered | New York, NY | Tarter Krinsky & Drogin LLP | New England Law Boston |
| Madeleine Ann Ostertag | 6112114 | 2024 | Currently registered | New York, NY | Maynard Nexsen, PC | Georgetown University Law Center |
| Oliver Ostertag | 5355458 | 2015 | Suspended, delinquent | London, United Kingdom | Paul, Weiss, Rifkind, Wharton & Garrison LLP | University of Pennsylvania Carey Law School |
| Thomas Joseph Ostertag | 1801224 | 1982 | Currently registered | Scarsdale, NY | Ostertag Consulting, Inc. | University of Virginia School of Law |
| Adam Jason Osterweil | 4652731 | 2009 | Currently registered | New York, NY | Frankfurt Kurnit Klein & Selz PC | Syracuse University College of Law |
| Eric Osterweil | 1630748 | 1960 | Delinquent | Harvard Law School | ||
| Ryan Scott Osterweil | 5001649 | 2012 | Currently registered | San Rafael, CA | Jack Daniel’s Properties, Inc. | Albany Law School |
| Scott D. Ostfeld | 4162491 | 2003 | Currently registered | New York, NY | Jana Partners | Columbia Law School |
| David Roy Ostheimer | 1166016 | 1974 | Due to re‑register | New York, NY | Lamb & Lerch | Syracuse University College of Law |
| Kimberlee A. Ostheimer | 4700928 | 2009 | Delinquent | Benjamin N. Cardozo School of Law, Yeshiva University | ||
| Michael Feuer Ostheimer | 2477420 | 1992 | Resigned | Columbia Law School | ||
| Cristoforo Osti | 2124899 | 1987 | Currently registered | Milan, Italy | Chiomenti | University of Michigan Law School |
| David B. Ostiller | 1943323 | 1984 | Suspended, delinquent | Golden Gate University School of Law | ||
| Gregory Edward Ostling | 3952702 | 1999 | Currently registered | New York, NY | Wachtell, Lipton, Rosen & Katz | Columbia Law School |
| Jacob Daniel Ostling | 5684824 | 2019 | Currently registered | Rye, NY | Fabricant LLP | Boston University School of Law |
| Kirsten MC Kenzie Ostling | 6292791 | 2026 | Currently registered | New York, NY | Linklaters LLP | Fordham University School of Law |
| Paul James Ostling | 1218379 | 1974 | Delinquent | New Canaan, CT | Fordham University School of Law | |
| Grant Allen Ostlund | 5688866 | 2019 | Currently registered | Plainsboro, NJ | Novo Nordisk Inc. | Seton Hall University School of Law |
| Susannah Sinclair Ostlund | 5252697 | 2014 | Currently registered | Georgetown University Law Center | ||
| Daniel Kenneth Ostmann | 6295661 | 2026 | Currently registered | Albany Law School | ||
| Steven Mark Ostner | 1260462 | 1979 | Currently registered | New York, NY | Debevoise & Plimpton LLP | Yale Law School |
| Yvette Ostolaza | 4637682 | 2008 | Due to re‑register | Dallas, TX | Sidley Austin LLP | University of Miami School of Law |
| Karla Marie Ostolaza Ortiz | 5315627 | 2015 | Currently registered | Bronx, NY | The Bronx Defenders | Benjamin N. Cardozo School of Law, Yeshiva University |
| Richard David Ostor | 1099456 | 1972 | Delinquent | Brooklyn Law School | ||
| Rachel Ann Ostow | 1524743 | 1979 | Currently registered | New York, NY | Coldwell Banker Warburg | Columbia Law School |
| Kama Coco Ostoya | 4840708 | 2010 | Suspended, delinquent | London, United Kingdom | Amazon Web Services | Columbia Law School |
| Joseph Allen Ostoyich | 2457679 | 1992 | Currently registered | Washington, DC | Clifford Chance US LLP | University of Chicago Law School |
| Daniel Eisenmann Ostrach | 5494489 | 2017 | Currently registered | Redmond, WA | Microsoft Corporation | Boston College Law School |
| Michael S. Ostrach | 1224765 | 1977 | Due to re‑register | Berkeley, CA | Valitor | Stanford Law School |
| Ann-Elizabeth Ostrager | 4903233 | 2011 | Currently registered | New York, NY | Sullivan and Cromwell | New York University School of Law |
| Barry Robert Ostrager | 1202829 | 1973 | Currently registered | New York, NY | Barry R. Ostrager Adr LLC | New York University School of Law |
| Eric William Ostrager | 2792448 | 1997 | Currently registered | Islandia, NY | Gottlieb Ostrager, LLP | George Washington University Law School |
| Glenn Frederick Ostrager | 1508456 | 1978 | Currently registered | New York, NY | Ostrager Chong Flaherty & Broitman P.C. | St. John’s University School of Law |
| Jane Beth Ostrager | 6067227 | 2023 | Currently registered | New York, NY | U.S. District Court for the Southern District of New York | Yale Law School |
| Jeffrey N. Ostrager | 1717263 | 1981 | Currently registered | New York, NY | Venable LLP | New York University School of Law |
| Francis Michael Ostrander | 4278222 | 2005 | Currently registered | Rochester, NY | Woods Oviatt Gilman, LLP | University at Buffalo School of Law (SUNY) |
| George William Ostrander | 1890318 | 1983 | Currently registered | St. John’s University School of Law | ||
| Kristopher N. Ostrander | 4982120 | 2012 | Currently registered | La Jolla, CA | Torreyana Capital | Albany Law School |
| Leslie Olivia Tobin Ostrander | 4411732 | 2006 | Due to re‑register | Boston, MA | Oliver Wyman Group | Fordham University School of Law |
| Nathan Hawkins Ostrander | 4511242 | 2007 | Currently registered | Harvard Law School | ||
| Richard A. Ostrander | 2733350 | 1996 | Currently registered | New York, NY | Federal Reserve Bank of New York | Stanford Law School |
| Rachel Michelle Ostreich | 5685722 | 2021 | Disbarred | Touro University Jacob D. Fuchsberg Law Center | ||
| Adam Michael Ostreicher | 4576401 | 2008 | Currently registered | Cedarhurst, NY | Ostreicher Law PLLC | Fordham University School of Law |
| David Ostreicher | 4284402 | 2005 | Delinquent | Uniondale, NY | Brookview Realty Group, LLC | Fordham University School of Law |
| Evan Alexander Ostrer | 4654133 | 2009 | Currently registered | Rochelle Park, NJ | Guaglardi & Meliti, LLP | Western Michigan University Cooley Law School |
| Mitchel Eric Ostrer | 1682616 | 1980 | Currently registered | Trenton, NJ | New Jersey Judiciary | Columbia Law School |
| Paul Walker Ostrer | 5686555 | 2019 | Currently registered | Brooklyn, NY | Kings County District Attorney’s Office | University at Buffalo School of Law (SUNY) |
| Ellen Faith Ostrick | 2501781 | 1992 | Delinquent | Columbia Law School | ||
| Gail Cynthia Ostriker | 2273472 | 1979 | Delinquent | Brooklyn Law School | ||
| Baker Benjamin Ostrin | 2126084 | 1987 | Currently registered | Los Angeles, CA | Los Angeles County Public Defenders | Yale Law School |
| Daniel Jacob Ostrin | 5661210 | 2019 | Currently registered | Yonkers, NY | Novick Edelstein Pomerantz, PC | Syracuse University College of Law |
| Holden L. Ostrin | 2121408 | 1987 | Currently registered | Boston University School of Law | ||
| Zvi Ostrin | 3936549 | 2001 | Currently registered | New York, NY | Zvi Ostrin | Benjamin N. Cardozo School of Law, Yeshiva University |
| Maurice Samuel Ostro | 2220176 | 1988 | Currently registered | London, United Kingdom | Maurice’s Ostro | University of Oxford Faculty of Law |
| Sheldon Ostro | 1221472 | 1960 | Disbarred | |||
| Frank Ostroff | 2224509 | 1988 | Suspended, delinquent | New York, NY | McKinsey and Co Inc | |
| Gary Edward Ostroff | 2790756 | 1997 | Currently registered | New York, NY | Greenberg, Trager & Herbst, LLP | Brooklyn Law School |
| Irwin Ostroff | 1809128 | 1982 | Currently registered | New Providence, NJ | Irwin Ostroff Esquire | Seton Hall University School of Law |
| Joseph Scott Ostroff | 4597613 | 2008 | Currently registered | Pearl River, NY | Momentive Performance Materials Inc. | George Washington University Law School |
| Andrew M. Ostrognai | 2431880 | 1991 | Currently registered | New York, NY | Debevoise & Plimpton LLP | University of Chicago Law School |
| Anna Kallet Ostrom | 5153259 | 2013 | Currently registered | New York Law School | ||
| Kristofer Raymond Ostrom | 4727020 | 2009 | Currently registered | Denver, CO | Colorado Department of Regulatory Agencies | Albany Law School |
| Samantha Jill Ostrom | 5567409 | 2018 | Currently registered | Washington, DC | Vanguard | Cornell Law School |
| Rochelle F. Ostroskey | 3006368 | 2000 | Suspended, delinquent | Albany Law School | ||
| Maria Ostroumova | 4863551 | 2010 | Currently registered | Walnut Creek, CA | CS Power Systems Inc. | University of California, Berkeley, School of Law |
| Jerome Ostrov | 2161990 | 1967 | Currently registered | Albany Law School | ||
| Richard Edward Ostrov | 2269702 | 1989 | Currently registered | Troy, NY | Youngsommer LLC | Western New England University School of Law |
| Robert Lawrence Ostrov | 2341279 | 1990 | Currently registered | New York, NY | Robert L. Ostrov Attorney at Law | Fordham University School of Law |
| Elliot David Ostrove | 2928356 | 1998 | Currently registered | New York, NY | Epstein Ostrove LLC | Rutgers Law School |
| Fredric David Ostrove | 2786093 | 1997 | Currently registered | Carle Place, NY | Leeds Brown Law, P.C. | Maurice A. Deane School of Law at Hofstra University |
| Michael Matthew Ostrove | 2616266 | 1994 | Currently registered | New York, NY | Dla Piper LLP (Us) | University of California, Berkeley, School of Law |
| Natalie Rose Ostrove | 6151708 | 2024 | Currently registered | Bronx, NY | The Legal Aid Society | Lewis & Clark Law School |
| Norman Paul Ostrove | 4535829 | 2007 | Currently registered | Philadelphia, PA | Securities and Exchange Commission | University of Pennsylvania Carey Law School |
| Ilit Ostrovitch-Levi | 5067848 | 2012 | Suspended, delinquent | Duke University School of Law | ||
| Marina Ostrovskaya | 5125711 | 2013 | Currently registered | Hempstead, NY | Jadeja Cimone Law PC | New York Law School |
| Peter Ostrovski | 4935755 | 2011 | Currently registered | Harvard Law School | ||
| Vitaly Ostrovski | 2880615 | 1998 | Currently registered | New York, NY | Vitaly Ostrovski Esq. | New York Law School |
| Alexander Ostrovsky | 5390331 | 2017 | Delinquent | Tampa, FL | First American Law Group | Nova Southeastern University Shepard Broad College of Law |
| Danielle Melanie Ostrovsky | 5810510 | 2020 | Delinquent | Fort Lauderdale, FL | Ostrovsky Law | Nova Southeastern University Shepard Broad College of Law |
| Elina Ostrovsky | 5667092 | 2019 | Currently registered | Dallas, TX | Akin Gump | Fordham University School of Law |
| Maria Ostrovsky | 4411682 | 2006 | Suspended, delinquent | Boston, MA | Cooley LLP | University of Pennsylvania Carey Law School |
| Serafima Michailovna Ostrovsky | 5156088 | 2013 | Currently registered | London, United Kingdom | Linklaters LLP | New York University School of Law |
| Alan Ostrow | 1696178 | 1980 | Delinquent | Brooklyn, NY | Maurice A. Deane School of Law at Hofstra University | |
| Alec P. Ostrow | 1700905 | 1981 | Currently registered | New York, NY | Becker, Glynn, Muffly, Chassin & Hosinski LLP | New York University School of Law |
| Ashira Pelman Ostrow | 4230710 | 2004 | Due to re‑register | Hempstead, NY | Hofstra Law School | Columbia Law School |
| Blake Justin Ostrow | 4963351 | 2011 | Currently registered | University of Pennsylvania Carey Law School | ||
| Daniel Tawil Ostrow | 4401253 | 2006 | Currently registered | Doral, FL | World Fuel Services | Georgetown University Law Center |
| Eleanor J. Ostrow | 1801141 | 1982 | Currently registered | Yale Law School | ||
| Elisabeth Gardner Ostrow | 2531705 | 1993 | Currently registered | New York University School of Law | ||
| Elizabeth Ostrow | 2188423 | 1988 | Due to re‑register | New York, NY | Elizabeth S. Ostrow, Esq. | Benjamin N. Cardozo School of Law, Yeshiva University |
| Jamie Beth Ostrow | 4275814 | 2004 | Currently registered | Washington, DC | Crowdcheck Law LLP | New York University School of Law |
| Jeffrey Eric Ostrow | 2392496 | 1991 | Currently registered | Hillsborough, CA | Ostrow LLP | New York University School of Law |
| Katharine Lee Ostrow | 5086046 | 2013 | Currently registered | New York, NY | Omers Infrastrcture | University of Michigan Law School |
| Marc Daniel Ostrow | 2337236 | 1990 | Currently registered | New York, NY | Law Offices of Marc D. Ostrow | University of Chicago Law School |
| Ronny Tawil Ostrow | 5056254 | 2012 | Currently registered | Brooklyn Law School | ||
| Seth H. Ostrow | 2532257 | 1993 | Currently registered | New York, NY | Meister Seelig & Schuster PLLC | Boston University School of Law |
| Stacia Ostrow | 2370153 | 1990 | Suspended, delinquent | New York Law School | ||
| Stephen Russell Ostrow | 1150655 | 1960 | Due to re‑register | Syracuse University College of Law | ||
| Melissa Kotlow Ostrower | 3053154 | 2000 | Currently registered | New York, NY | Jackson Lewis P.C. | George Washington University Law School |
| Silvia Noemi Ostrower | 4319075 | 2005 | Currently registered | New York, NY | Hunton Andrews Kurth LLP | New York University School of Law |
| Alan Robert Ostrowitz | 1228899 | 1978 | Currently registered | New York, NY | Ostrowitz & Ostrowitz | Washington University in St. Louis School of Law |
| Martha Dale Fried Ostrowitz | 2330132 | 1990 | Currently registered | New York, NY | Rutgers Law School | |
| Sheri Fried Ostrowitz | 5302047 | 2015 | Currently registered | Rutgers Law School | ||
| Chester Richard Ostrowski | 4923330 | 2011 | Currently registered | New York, NY | McLaughlin & Stern LLP | Seton Hall University School of Law |
| George T. Ostrowski Jr | 2769719 | 1996 | Currently registered | St. John’s University School of Law | ||
| Izabela Ostrowski | 4127973 | 2003 | Currently registered | New York, NY | Wilmer Hale | Elisabeth Haub School of Law at Pace University |
| James Ostrowski | 6274401 | 2026 | Currently registered | University of Washington School of Law | ||
| James M. Ostrowski | 1942788 | 1984 | Currently registered | Buffalo, NY | James Ostrowski Attorney at Law | Brooklyn Law School |
| Melissa Ostrowski | 5050588 | 2012 | Currently registered | Clarence, NY | University at Buffalo School of Law (SUNY) | |
| Nicole Ostrowski | 4079638 | 2002 | Currently registered | Los Angeles, CA | Willkie Farr & Gallagher LLP | Columbia Law School |
| Peter J. Ostrowski | 1559137 | 1974 | Due to re‑register | Albany Law School | ||
| Rachel Anne Ostrowski | 6248199 | 2025 | Currently registered | New York, NY | Fried, Frank, Harris, Shriver & Jacobson LLP | Syracuse University College of Law |
| Stephen Timothy Ostrowski | 3988235 | 2001 | Currently registered | London, United Kingdom | European Bank for Reconstruction and Development | New York University School of Law |
| Thomas Walter Ostrowski | 2634129 | 1994 | Due to re‑register | Cleveland, OH | Tucker Ellis LLP | Cleveland State University College of Law |
| Tristan Ostrowski | 4510483 | 2007 | Currently registered | Mountain View, CA | Google, Inc. | New York University School of Law |
| Catherine Rose Ostrowski Martin | 5582770 | 2018 | Currently registered | Buffalo, NY | New York State Division of Human Rights | Syracuse University College of Law |
| Adam Lee Ostrowsky | 4504056 | 2007 | Currently registered | New York, NY | Mack Real Estate Group | George Washington University Law School |
| Howard Gene Ostrowsky | 2184208 | 1984 | Currently registered | New York, NY | Citigroup Inc. | New York University School of Law |
| Joseph Ostrowsky | 1944685 | 1984 | Due to re‑register | West Nyack, NY | Joseph Ostrowsky | |
| Zachary Samuel Ostrup | 5587639 | 2018 | Currently registered | New York, NY | Gordon, Rees, Scully & Mansukhani | Northwestern University Pritzker School of Law |
| Jonathan Ryan Ostrzega | 4789533 | 2010 | Currently registered | Montreal, Canada | PSP Investments | McGill University Faculty of Law |
| Christopher John Ostuni | 4137964 | 2003 | Currently registered | Mineola, NY | Nassau County Legislature | Maurice A. Deane School of Law at Hofstra University |
| Nicholas Ostuni | 2807725 | 1997 | Currently registered | Hackensack, NJ | Hon. Nicholas Ostuni, J.S.C. | Brooklyn Law School |
| Patricia Ostuni | 2737179 | 1996 | Suspended, delinquent | New York, NY | Prudential Securities Inc. | Rutgers Law School |
| David Hugh Ostwald | 1871722 | 1983 | Currently registered | New York, NY | New York Law School | |
| Peter Brian Ostwald | 2588101 | 1994 | Currently registered | Albany, NY | New York State Dept. of Taxation and Finance Office of Counsel | Widener University School of Law |
| Sandra Leonie Ostwald | 4687406 | 2009 | Currently registered | Newark, NJ | Office of the Attorney General Division of Law | Touro University Jacob D. Fuchsberg Law Center |
| Patricia Romano Osuch | 5848072 | 2021 | Currently registered | Syracuse University College of Law | ||
| Chidima Maryanne Osuchukwu | 6154819 | 2024 | Currently registered | New York, NY | Morgan Lewis | George Washington University Law School |
| Adesua Rachael Osuide | 2992386 | 1999 | Suspended, delinquent | Lagos, Nigeria | Eco Bank Nigeria PLC | Cornell Law School |
| Kelechukwu Chibuzor Osuji | 5779467 | 2020 | Currently registered | San Francisco, CA | Provenance Technologies, Inc. | George Washington University Law School |
| Kizito Ikechukwu Osuji | 4729950 | 2009 | Currently registered | Golden Gate University School of Law | ||
| Aisling O’Sullivan | 4457735 | 2007 | Currently registered | Elisabeth Haub School of Law at Pace University | ||
| Allan Thomas O’Sullivan | 1336833 | 1975 | Due to re‑register | Raleigh, NC | Social Security Administration Odar | Maurice A. Deane School of Law at Hofstra University |
| Anne Marie O’Sullivan | 2617876 | 1994 | Currently registered | Catholic University of America, Columbus School of Law | ||
| Barry J. O’Sullivan | 1815257 | 1982 | Due to re‑register | Fordham University School of Law | ||
| Brad Preston O’Sullivan | 2564805 | 1993 | Currently registered | Georgetown University Law Center | ||
| Brandon Mark O’Sullivan | 6149330 | 2024 | Due to re‑register | St. John’s University School of Law | ||
| Brian Joseph O’Sullivan | 2403897 | 1991 | Currently registered | New York, NY | Husch Blackwell | Fordham University School of Law |
| Caitlin O’Sullivan | 5661871 | 2018 | Due to re‑register | Washington, DC | U.S. Environmental Protection Agency | Northeastern University School of Law |
| Cara Ann O’Sullivan | 3930872 | 2001 | Currently registered | Garden City, NY | Kaufman Borgeest & Ryan LLP | Maurice A. Deane School of Law at Hofstra University |
| Cara Jean O’Sullivan | 4485686 | 2007 | Currently registered | Middletown, CT | Connecticut Employees Union Independent | Roger Williams University School of Law |
| Damian O’Sullivan | 5864996 | 2021 | Currently registered | New York, NY | Cravath, Swaine & Moore LLP | University of Pennsylvania Carey Law School |
| Daniel B. O’Sullivan | 4129565 | 2003 | Currently registered | St. John’s University School of Law | ||
| Daniel F. O’Sullivan | 1586601 | 1965 | Currently registered | Fordham University School of Law | ||
| Dennis Brendan O’Sullivan | 2932200 | 1999 | Currently registered | Flushing, NY | Law Office of Dennis O’Sullivan | Fordham University School of Law |
| Dennis J. O’Sullivan | 2275162 | 1990 | Currently registered | Bayside, NY | Law Office of Dennis J. Osullivan, P.C. | New York Law School |
| Erin Patricia O’Sullivan | 5869169 | 2021 | Currently registered | Washington, DC | Dentons US LLP | Georgetown University Law Center |
| Evelyne A. O’Sullivan | 2482958 | 1992 | Currently registered | East Amherst, NY | Evelyne A. O’Sullivan, Esq. | University at Buffalo School of Law (SUNY) |
| Ingrid Elaine O’Sullivan | 4219382 | 2004 | Currently registered | Yorktown Heights, NY | The Law Office of Ingrid E. O’Sullivan | Brooklyn Law School |
| James Joseph O’Sullivan | 2840098 | 1997 | Currently registered | Boca Raton, FL | James J Osullivan | Elisabeth Haub School of Law at Pace University |
| James Kevin O’Sullivan | 1811033 | 1982 | Currently registered | New York Law School | ||
| James Paul O’Sullivan | 2473486 | 1992 | Due to re‑register | Georgetown University Law Center | ||
| Jennifer Pogorelec O’Sullivan | 3951464 | 2001 | Currently registered | New York, NY | Nycfc | Catholic University of America, Columbus School of Law |
| Jerem O’Sullivan | 1119957 | 1976 | Due to re‑register | Williston Park, NY | O’Sullivan Cunningham LLP | Albany Law School |
| Jeremiah John O’Sullivan | 2525269 | 1993 | Suspended, delinquent | North Hampton, NH | Elisabeth Haub School of Law at Pace University | |
| Jill Elizabeth O’Sullivan | 2590784 | 1994 | Currently registered | Lake Placid, NY | Flink Maswick Law PLLC | Elisabeth Haub School of Law at Pace University |
| John F. O’Sullivan | 2315646 | 1990 | Due to re‑register | Miami, FL | Quinn Emanuel | George Washington University Law School |
| John Patrick O’Sullivan | 2164564 | 1987 | Currently registered | New York, NY | Sheeley, LLP | Brooklyn Law School |
| Julie R. O’Sullivan | 1995224 | 1985 | Currently registered | Washington, DC | Georgetown Univ Law Center | Cornell Law School |
| Kate O’Sullivan | 5935762 | 2022 | Due to re‑register | Trinity College Dublin School of Law | ||
| Kelly Marie O’Sullivan | 2941730 | 1999 | Currently registered | Helena, MT | Banking & Financial Institutions | |
| Kevin Edward Francis O’Sullivan | 1559566 | 1977 | Due to re‑register | Fordham University School of Law | ||
| Kevin John O’Sullivan | 4150884 | 2003 | Currently registered | Brooklyn, NY | Fordham University School of Law | |
| Kevin M. O’Sullivan | 4149696 | 2003 | Currently registered | Astoria, NY | The Law Offices of Kevin M. O’Sullivan, PLLC | St. John’s University School of Law |
| Leilani Lynne O’Sullivan | 6126825 | 2024 | Due to re‑register | New York, NY | Nylag Tenant Rights Unit | Brooklyn Law School |
| Liam Daniel O’Sullivan | 5446729 | 2016 | Due to re‑register | University of Michigan Law School | ||
| Margaret Claire O’Sullivan | 4939237 | 2011 | Currently registered | Washington, DC | Financial Industry Regulatory Authority | Columbia Law School |
| Mary Bridget O’Sullivan | 2457950 | 1992 | Currently registered | Elisabeth Haub School of Law at Pace University | ||
| Mary Ellen O’Sullivan | 4639910 | 2009 | Currently registered | Memphis, TN | Sedgwick Claims Management Services Inc. | Western Michigan University Cooley Law School |
| Mary M. O’Sullivan | 2750859 | 1996 | Currently registered | New York, NY | NYC Law Department | Fordham University School of Law |
| Mary Therese O’Sullivan | 5235767 | 2014 | Currently registered | New York, NY | Fox Rothschild, LLP | Rutgers Law School |
| Maura E. O’Sullivan | 2067924 | 1986 | Due to re‑register | New York, NY | Allen Overy Shearman Sterling US LLP | Fordham University School of Law |
| Michael Clement O’Sullivan | 2733525 | 1996 | Currently registered | Pelham, NY | Duke University School of Law | |
| Michael J. O’Sullivan | 2023315 | 1986 | Currently registered | Huntington, NY | Allan B. Mendelsohn, LLP | St. John’s University School of Law |
| Michael J. O’Sullivan | 3990470 | 2001 | Currently registered | Brooklyn, NY | New York Law Department | St. John’s University School of Law |
| Niall Michael O’Sullivan | 5133335 | 2013 | Currently registered | Allschwil, Switzerland | Abbott Products Operations Ag | |
| Nicole Jean O’Sullivan | 5274444 | 2014 | Currently registered | Cork, Ireland | Nikki O’Sullivan BL | University College Cork School of Law |
| Patrick John O’Sullivan | 2331288 | 1990 | Currently registered | White Plains, NY | Keane & Beane, P.C. | Fordham University School of Law |
| Patrick John O’Sullivan | 2583383 | 1994 | Due to re‑register | Wampsville, NY | Madison County Courthouse | Western Michigan University Cooley Law School |
Source: NY Office of Court Administration, attorney registration file (data.ny.gov, dataset eqw2-r5nb), downloaded Sep 29, 2026.