New York attorney record · Judicial Dept 2
Annie Mahoney O'Brien
Catholic University Of America Columbus School Of Law (Dc) alumna, admitted to the New York bar in 2018, registered office in New York, NY. This record's status, address, and registration history come straight from the NY Office of Court Administration.
- 2018
- Admitted
- 8
- Years in bar
- 5633904
- NY reg #
The record in one line
Admitted in 2018, Annie Mahoney O'Brien has built 8 years of active New York practice - more tenure than 13% of the state's currently-active attorneys.
- 8 yrs
- in active practice since admission
- Active
- current bar status: "Currently registered"
- #67748 of 93,608
- by tenure in New York office peers
- Law school
- Catholic University Of America Columbus School Of Law (Dc)
Data updated September 2026
What this profile tells you
Bar status & tenure
Bar number 5633904 on the New York register belongs to Annie Mahoney O'Brien, currently in active standing. Registration is recorded within Judicial Department 2, the appellate division overseeing this attorney's home district.
Practice context & education
Practice address is listed under Memorial Sloan Kettering Cancer Center, located in New York, NY (New York County), ZIP 10017. 5 other attorneys share this firm affiliation in the registry. Educational background: Catholic University of America Columbus School of Law (DC).
State context & due diligence
Annie Mahoney O'Brien is currently part of the New York bar's active cohort, a group the breakdown below sizes against the full register.
Experience vs. the active New York bar
8 years into an active New York practice since a 2018 admission, Annie Mahoney O'Brien sits here on the statewide experience curve - taller bars hold more attorneys at that experience level.
8 years on the New York bar
Years since admission, all currently-active NY attorneys
8 Top 87% higher than 13% of 290,787 active NY attorneys
Each bar is a band; taller bars hold more active NY attorneys. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NY Office of Court Administration, Attorney Registration · September 2026
Tenure among New York, NY office peers
Annie Mahoney O'Brien's 8-year NY register tenure places mid-pack in New York, NY: rank #67,748 of 93,608 office peers (72nd percentile). See the New York attorney directory .
- Local rank
- #67,748
- City cohort
- 93,608
- Local percentile
- 72nd
- Admitted
- 2018
Nearest tenure peers in New York
- Leah F. Aaronson admitted 2018 · 8 yr
- Danielle Brooke Abada admitted 2018 · 8 yr
- Waleed Tareef Abbasi admitted 2018 · 8 yr
- Susi Kristin Abdelmalek admitted 2018 · 8 yr
How local rank is computed
Rank uses years since NY-bar admission among non-deceased registry rows that list the same office city and state, a local placement, not a statewide claim. Source: NY Office of Court Administration Attorney Registration · as of September 2026. Derived local rank, not published upstream.
How Annie compares to fellow Catholic University Of America Columbus School Of Law (Dc) alumni
Among the 269 Catholic University Of America Columbus School Of Law (Dc) graduates in the New York register, Annie Mahoney O'Brien is longer-tenured than 18%.
8 years vs. Catholic University Of America Columbus School Of Law (Dc) alumni
Years since admission - 269 NY-registered alumni of this school
8 Top 82% higher than 18% of 269 fellow alumni
Each bar is a band; taller bars hold more fellow alumni. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NY Office of Court Administration, Attorney Registration · September 2026
The 2018 admission class today
Of the 8,750 attorneys admitted to the New York bar in 2018, 73.4% are still "Currently registered" today, above the statewide average across all admission years.
Professional Details
- Status
- Currently registered
- Registration Number
- 5633904
- Year Admitted
- 2018 (8 yrs · mid-career)
- Judicial Department
- 2
- Next Registration
- Apr 2028
Location & Contact
- Company
- Memorial Sloan Kettering Cancer Center
- City
- New York, NY
- County
- New York
- ZIP Code
- 10017
- Phone
- (646) 227-3574
Education
Catholic University of America Columbus School of Law (DC)
Status Distribution Across the New York Bar
Annie Mahoney O'Brien's current status, "Currently registered", places this attorney in the 67.2% of the 432,625-attorney New York register currently marked active.
Full statewide breakdown & source note
Source: NY Office of Court Administration, Attorney Registrations. Status counts reflect the latest reporting cycle. Bar status confirms registration only; it does not imply competence, specialty fit, or freedom from complaints.
Same firm affiliation: Memorial Sloan Kettering Cancer Center
Other NY-registered attorneys who share this firm name on the OCA register (not a geographic peer set).
Near-tenure Catholic University Of America Columbus School Of Law (Dc) alumni
Fellow alumni on the NY register whose admission year is closest to 2018 (excluding same-firm colleagues above).
Same admission year (2018), other cities
NY-registered attorneys admitted in 2018 whose listed office city differs from New York, a vintage cohort, not a neighborhood list.
Nationwide attorneys with similar admission year or city registry density
Two non-geo peer axes for Annie Mahoney O'Brien: closest NY bar admission year outside NY, and closest out-of-state office cities by how many NY-registered attorneys they list (~93,609 here). Distinct from same-firm, fellow-alumni, and same-year other-city strips above.
Similar admission year (~2018)
Counts come from the NY State Office of Court Administration registration extract; peers are not a competence or practice-area ranking.
Verify This Attorney
Verify on NY Courts Attorney SearchNearby Attorneys in New York, NY
Compare credentials side-by-side
Compare Annie Mahoney O'Brien with similar attorneys in New York.
Compare attorneys →Before you rely on this record
Annie Mahoney O'Brien's "Currently registered" listing confirms bar standing only, it is a registration fact to verify, not a verdict on quality or competence.
Frequently Asked Questions
Where is Annie O'Brien licensed?
Annie O'Brien is licensed to practice law in New York.
When was Annie Mahoney O'Brien admitted to the bar?
Annie Mahoney O'Brien has been on the New York bar register since 2018.
Where did Annie Mahoney O'Brien go to law school?
Annie Mahoney O'Brien attended Catholic University of America Columbus School of Law (DC).
What company does Annie Mahoney O'Brien work for?
Annie Mahoney O'Brien is associated with Memorial Sloan Kettering Cancer Center in New York, NY.
Is Annie Mahoney O'Brien in good standing?
Yes, Annie Mahoney O'Brien holds active bar status ("Currently registered").
Cite this page & disclosure
Sourced from the NY Office of Court Administration, informational only, not legal advice. Full disclosure.
Read our methodology - how this data is sourced, computed, and verified.