Matthew Philip Siben
On the New York attorney register since 2001 · office in Los Angeles, CA
PlainAttorney’s reading of the public register file, not a court record.
- Registration No.
- 3907516
- Admitted
- 2001 · Second Department
- Status
- Currently registered
- Next registration
- Apr 2027
Matthew Philip Siben is currently registered on the New York attorney register file of Sep 29, 2026. Admitted in 2001 in the Second Department, with an office in Los Angeles, CA; next registration due Apr 2027. The status is the same in all 3 files we hold.
What this status means on the register
On the register, “Currently registered” means Matthew Philip Siben has filed the biennial registration the court system requires; the next one is due in Apr 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 “The Rosen Law Firm”. We count that spelling with The Rosen Law Firm, P.A., the name most registrants give for the firm now; the register does not say where the attorney works today.
25 other attorneys list The Rosen Law Firm, P.A. or one of its other names as their employer on the register; 3 of them were admitted before 2001. The 5 whose admission is closest to 2001, earliest first:
| Attorney | Admitted | Status |
|---|---|---|
| Robin Bronzaft Howald | 1995 | Currently registered |
| Gary Scott Rosen | 1999 | Currently registered |
| Phillip Kim | 2003 | Currently registered |
| Sara Esther Fuks | 2005 | Currently registered |
| Brian Burkons Alexander | 2009 | 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
Matthew Philip Siben studied at Harvard Law School (the register spells it “HARVARD”). 3,057 of its 14,378 living graduates on the register were admitted in the 2000s, as Matthew Philip Siben was.
- Same law school
- 14,378living graduates; 86.1% registered (current or due), against 87.1% overall
- Office in Los Angeles, CA
- 2,891living registrants (outside New York State)
Of the 2,891 living registrants with an office in Los Angeles, CA, 813 were admitted before 2001 and 2,014 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 The Rosen Law Firm, P.A.26 on the register, 3 of the others admitted before 2001.
- Harvard Law School graduates on the register14,378 living, 86.1% registered.
- New York-admitted attorneys in Los Angeles, CA2,891 living registrants give an office there.
- Admitted in 20017,416 people admitted in 2001 are on the register, 2,218 of them through the Second 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 Matthew Philip Siben’s standing, contact the Attorney Registration Unit of the NY Office of Court Administration (nycourts.gov/attorneys), or ask the Appellate Division, Second Department, which admitted Matthew Philip Siben in 2001. 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).