Sean James Masterson
On the New York attorney register since 2008 · office in Boston, MA
PlainAttorney’s reading of the public register file, not a court record.
- Registration No.
- 4616538
- Admitted
- 2008 · Third Department
- Status
- Currently registered
- Next registration
- Apr 2028
Sean James Masterson is currently registered on the New York attorney register file of Sep 29, 2026. Admitted in 2008 in the Third Department, with an office in Boston, MA; 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 Sean James Masterson 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
The register gives this attorney’s employer as “Mintz Levin”. We count that spelling with Mintz, Levin, Cohn, Ferris, Glovsky and Popeo, P.C., the name most registrants give for the firm now; the register does not say where the attorney works today.
193 other attorneys list Mintz, Levin, Cohn, Ferris, Glovsky and Popeo, P.C. or one of its other names as their employer on the register; 70 of them were admitted before 2008, and 47 of the 194 give an office in Boston, MA. The 5 whose admission is closest to 2008, earliest first:
| Attorney | Admitted | Status |
|---|---|---|
| Lisamarie Frances Collins | 2008 | Currently registered |
| Evan D. Diamond | 2008 | Due to re‑register |
| Tara Elizabeth Dwyer | 2008 | Due to re‑register |
| Judah Eric Feder | 2008 | Due to re‑register |
| Marc Ethan Haas | 2008 | Due to re‑register |
All 194 registrations that list Mintz, Levin, Cohn, Ferris, Glovsky and Popeo, P.C.
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
Sean James Masterson studied at William & Mary Law School (the register spells it “WILLIAM & MARY SCHOOL OF LAW”). 241 of its 1,056 living graduates on the register were admitted in the 2000s, as Sean James Masterson was.
- Same law school
- 1,056living graduates; 88.5% registered (current or due), against 87.1% overall
- Office in Boston, MA
- 2,932living registrants (outside New York State)
Of the 2,932 living registrants with an office in Boston, MA, 1,229 were admitted before 2008 and 1,607 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 Mintz, Levin, Cohn, Ferris, Glovsky and Popeo, P.C.194 on the register, 70 of the others admitted before 2008; 47 of the 194 give an office in Boston, MA.
- William & Mary Law School graduates on the register1,056 living, 88.5% registered.
- New York-admitted attorneys in Boston, MA2,932 living registrants give an office there.
- Admitted in 20089,683 people admitted in 2008 are on the register, 3,278 of them through the Third 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 Sean James Masterson’s standing, contact the Attorney Registration Unit of the NY Office of Court Administration (nycourts.gov/attorneys), or ask the Appellate Division, Third Department, which admitted Sean James Masterson in 2008. 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).