Mark Holliday Vacha
On the New York attorney register since 1997 · office in Philadelphia, PA
PlainAttorney’s reading of the public register file, not a court record.
- Registration No.
- 2818839
- Admitted
- 1997 · Second Department
- Status
- Currently registered
- Next registration
- Apr 2027
Mark Holliday Vacha is currently registered on the New York attorney register file of Sep 29, 2026. Admitted in 1997 in the Second Department, with an office in Philadelphia, PA; next registration due Apr 2027. The status is the same in all 3 files we hold.
What this status means on the register
On the register, “Currently registered” means Mark Holliday Vacha has filed the biennial registration the court system requires; the next one is due in Apr 2027.
- Currently registered unchanged
- Currently registered unchanged
- Currently registered the first file we hold
Source: NY Office of Court Administration, attorney registration file (data.ny.gov, dataset eqw2-r5nb), downloaded Sep 29, 2026; the Jul 3, 2026 and Aug 6, 2026 files for the history.
Others who list this employer on the register
240 other attorneys list Cozen O’Connor or one of its other names as their employer on the register; 38 of them were admitted before 1997, and 39 of the 241 give an office in Philadelphia, PA. The 5 whose admission is closest to 1997, earliest first:
| Attorney | Admitted | Status |
|---|---|---|
| Michael Birney Deleeuw | 1997 | Currently registered |
| John Brian Galligan | 1997 | Currently registered |
| John Joseph Sullivan | 1997 | Currently registered |
| Wendy Kennedy Venoit | 1997 | Currently registered |
| Brian James Jude Walsh | 1997 | Suspended, delinquent |
Source: NY Office of Court Administration, attorney registration file (data.ny.gov, dataset eqw2-r5nb), downloaded Sep 29, 2026; employer spellings merged (methodology).
Where this record sits on the register
Mark Holliday Vacha studied at University of Virginia School of Law. 690 of its 4,707 living graduates on the register were admitted in the 1990s, as Mark Holliday Vacha was.
- Same law school
- 4,707living graduates; 87.2% registered (current or due), against 87.1% overall
- Office in Philadelphia, PA
- 1,878living registrants (outside New York State)
Of the 1,878 living registrants with an office in Philadelphia, PA, 347 were admitted before 1997 and 1,496 after.
Source: NY Office of Court Administration, attorney registration file (data.ny.gov, dataset eqw2-r5nb), downloaded Sep 29, 2026; living registrants only.
Questions this record leads to
- Everyone who lists Cozen O’Connor241 on the register, 38 of the others admitted before 1997; 39 of the 241 give an office in Philadelphia, PA.
- University of Virginia School of Law graduates on the register4,707 living, 87.2% registered.
- New York-admitted attorneys in Philadelphia, PA1,878 living registrants give an office there.
- Admitted in 19977,066 people admitted in 1997 are on the register, 2,422 of them through the Second Department.
- Every registration that reads “Currently registered”286,911 on the register file of Sep 29, 2026, by decade of admission.
- What a New York lawyer may chargeThe court rules on fees, retainers and fee disputes, each cited.
How to confirm it officially
For a statement of Mark Holliday Vacha’s standing, contact the Attorney Registration Unit of the NY Office of Court Administration (nycourts.gov/attorneys), or ask the Appellate Division, Second Department, which admitted Mark Holliday Vacha in 1997. The register places the office outside New York, so a complaint would go to that department’s grievance committee (22 NYCRR 1240.7(a)(2)).
This page reads the register file of Sep 29, 2026, and the court system’s own search can be newer; the register shows only the current value, so a suspension that ended before the files we hold, or a censure, leaves no trace here (Appellate Division decisions are published through the court system’s Law Reporting Bureau).