Mark Colburn Williams
On the New York attorney register since 1992 · office in Washington, DC
PlainAttorney’s reading of the public register file, not a court record.
- Registration No.
- 2499432
- Admitted
- 1992 · First Department
- Status
- Currently registered
- Next registration
- May 2028
Mark Colburn Williams is currently registered on the New York attorney register file of Sep 29, 2026. Admitted in 1992 in the First Department, with an office in Washington, DC; next registration due May 2028. 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 Colburn Williams has filed the biennial registration the court system requires; the next one is due in May 2028.
- 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
496 other attorneys list Clifford Chance US LLP or one of its other names as their employer on the register; 25 of them were admitted before 1992, and 43 of the 497 give an office in Washington, DC. The 5 whose admission is closest to 1992, earliest first:
| Attorney | Admitted | Status |
|---|---|---|
| Francois R. Bonteil | 1992 | Currently registered |
| Jamal Laurence El-Hindi | 1992 | Currently registered |
| James Andrew Grayer | 1992 | Currently registered |
| Joseph Allen Ostoyich | 1992 | Currently registered |
| Kathleen Love Werner | 1992 | Currently registered |
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 Colburn Williams studied at New York Law School (the register spells it “NY LAW SCHOOL”). 2,969 of its 15,601 living graduates on the register were admitted in the 1990s, as Mark Colburn Williams was.
- Same law school
- 15,601living graduates; 87.0% registered (current or due), against 87.1% overall
- Office in Washington, DC
- 12,527living registrants (outside New York State)
Of the 12,527 living registrants with an office in Washington, DC, 1,296 were admitted before 1992 and 11,101 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 Clifford Chance US LLP497 on the register, 25 of the others admitted before 1992; 43 of the 497 give an office in Washington, DC.
- New York Law School graduates on the register15,601 living, 87.0% registered.
- New York-admitted attorneys in Washington, DC12,527 living registrants give an office there.
- Admitted in 19926,498 people admitted in 1992 are on the register, 2,198 of them through the First 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 Colburn Williams’s standing, contact the Attorney Registration Unit of the NY Office of Court Administration (nycourts.gov/attorneys), or ask the Appellate Division, First Department, which admitted Mark Colburn Williams in 1992. 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).