Mathieu Antoine Dussault Swiderski
On the New York attorney register since 2015 · office in San Francisco, CA
PlainAttorney’s reading of the public register file, not a court record.
- Registration No.
- 5376223
- Admitted
- 2015 · Third Department
- Status
- Currently registered
- Next registration
- Oct 2027
Mathieu Antoine Dussault Swiderski is currently registered on the New York attorney register file of Sep 29, 2026. Admitted in 2015 in the Third Department, with an office in San Francisco, CA. The status is the same in all 3 files we hold.
What this status means on the register
On the register, “Currently registered” means Mathieu Antoine Dussault Swiderski has filed the biennial registration the court system requires; the next one is due in Oct 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
The register gives this attorney’s employer as “Perkins Coie LLP”. We count that spelling with Ashurst Perkins Coie LLP, the name most registrants give for the firm now; the register does not say where the attorney works today.
286 other attorneys list Ashurst Perkins Coie LLP or one of its other names as their employer on the register; 137 of them were admitted before 2015. The 5 whose admission is closest to 2015, earliest first:
| Attorney | Admitted | Status |
|---|---|---|
| Samantha Wilkinson Banfield | 2015 | Currently registered |
| Kristine Jolie Beaudoin | 2015 | Currently registered |
| Colton Michael Carothers | 2015 | Currently registered |
| Colin McCann Ceriello | 2015 | Currently registered |
| Maroun El Hachem | 2015 | 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
Mathieu Antoine Dussault Swiderski studied at McGill University Faculty of Law (the register spells it “MCGILL FACULTY OF LAW”). 275 of its 1,009 living graduates on the register were admitted in the 2010s, as Mathieu Antoine Dussault Swiderski was.
- Same law school
- 1,009living graduates; 87.8% registered (current or due), against 87.1% overall
- Office in San Francisco, CA
- 2,474living registrants (outside New York State)
Of the 2,474 living registrants with an office in San Francisco, CA, 1,786 were admitted before 2015 and 584 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 Ashurst Perkins Coie LLP287 on the register, 137 of the others admitted before 2015.
- McGill University Faculty of Law graduates on the register1,009 living, 87.8% registered.
- New York-admitted attorneys in San Francisco, CA2,474 living registrants give an office there.
- Admitted in 20158,867 people admitted in 2015 are on the register, 3,601 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 Mathieu Antoine Dussault Swiderski’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 Mathieu Antoine Dussault Swiderski in 2015. 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).