Ann Cynthia Diamond
On the New York attorney register since 1979 · office in New York, NY
PlainAttorney’s reading of the public register file, not a court record.
- Registration No.
- 1079797
- Admitted
- 1979 · First Department
- Status
- Currently registered
- Next registration
- Apr 2028
Ann Cynthia Diamond is currently registered on the New York attorney register file of Sep 29, 2026. Admitted in 1979 in the First Department, with an office in New York, NY; next registration due Apr 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 Ann Cynthia Diamond has filed the biennial registration the court system requires; the next one is due in Apr 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
24 other attorneys list Aronson Mayefsky & Sloan, LLP or one of its other names as their employer on the register; 1 of them was admitted before 1979, and 24 of the 25 give an office in New York, NY. The 5 whose admission is closest to 1979, earliest first:
| Attorney | Admitted | Status |
|---|---|---|
| David Aronson | 1975 | Currently registered |
| Allan Everett Mayefsky | 1979 | Currently registered |
| Patricia Ellen Hennessey | 1980 | Currently registered |
| Pamela Mary Sloan | 1981 | Currently registered |
| Lawrence Trachtenberg | 1982 | Currently registered |
All 25 registrations that list Aronson Mayefsky & Sloan, LLP
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
Ann Cynthia Diamond studied at New York University School of Law (the register spells it “NEW YORK UNIVERSITY”). 1,920 of its 23,248 living graduates on the register were admitted in the 1970s, as Ann Cynthia Diamond was.
- Same law school
- 23,248living graduates; 86.5% registered (current or due), against 87.1% overall
- Office in New York, NY
- 93,604living registrants
Of the 93,604 living registrants with an office in New York, NY, 4,378 were admitted before 1979 and 88,646 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 Aronson Mayefsky & Sloan, LLP25 on the register, 1 of the others admitted before 1979; 24 of the 25 give an office in New York, NY.
- New York University School of Law graduates on the register23,248 living, 86.5% registered.
- Attorneys with an office in New York, NY93,604 living registrants give an office there.
- New York County’s registered bar75,989 currently registered, 46.63 per 1,000 residents.
- Admitted in 19793,974 people admitted in 1979 are on the register, 1,513 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 Ann Cynthia Diamond’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 Ann Cynthia Diamond in 1979. A complaint about this attorney would go to the First Department’s grievance committee, which covers New York County, where the register places the office.
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).