John Joseph Sullivan
- Verified against the New York State attorney registration file, July 2026
39 years in practice
First admitted in 1987
First admitted in 1987
- 1987 Admitted, New York
Overview
John Joseph Sullivan is an attorney admitted in New York (since 1987), based in Washington, DC.
This profile is built from public bar records and shows only what those records contain. John has not written or endorsed anything on this page.
Jurisdictions admitted
| Jurisdiction | Admitted | Bar number | Status |
|---|---|---|---|
| New York | 1987 | #2146462 | Active |
Education
- Columbia Law SchoolLaw school, per the bar record
Contact and offices
Mayer Brown LLP
1999 K St Nw
Washington, DC 20006
The address and number above come from the attorney's public bar registration, which can lag a recent move. Confirm before visiting.
Other attorneys in Washington
Ordered by years licensed, from the same public records.
Sources for this profile: the New York State attorney registration file. License status can change; check the bar's own record for the current status before hiring. Updated July 12, 2026.