William Robert Irwin
On the New York attorney register since 2019 · office in Chicago, IL
PlainAttorney’s reading of the public register file, not a court record.
- Registration No.
- 5695770
- Admitted
- 2019 · Third Department
- Status
- Currently registered
- Next registration
- Apr 2027
William Robert Irwin is currently registered on the New York attorney register file of Sep 29, 2026. Admitted in 2019 in the Third Department, with an office in Chicago, IL; 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 William Robert Irwin 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 “Manning Gross & Massenburg LLP”. We count that spelling with Manning Gross + Massenburg LLP, the name most registrants give for the firm now; the register does not say where the attorney works today.
41 other attorneys list Manning Gross + Massenburg LLP or one of its other names as their employer on the register; 25 of them were admitted before 2019, and 5 of the 42 give an office in Chicago, IL. The 5 whose admission is closest to 2019, earliest first:
| Attorney | Admitted | Status |
|---|---|---|
| Colin Pei Kai Be | 2017 | Currently registered |
| Jason Henry Kramer | 2018 | Currently registered |
| John Joseph Kurowski | 2018 | Currently registered |
| Michael Henry Cantieri | 2019 | Currently registered |
| Timothy Lawrence Krippner | 2019 | Currently registered |
All 42 registrations that list Manning Gross + Massenburg 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
William Robert Irwin studied at Washington University in St. Louis School of Law (the register spells it “WASHINGTON UNIVERSITY SCHOOL OF LAW”). 707 of its 1,878 living graduates on the register were admitted in the 2010s, as William Robert Irwin was.
- Same law school
- 1,878living graduates; 89.3% registered (current or due), against 87.1% overall
- Office in Chicago, IL
- 2,265living registrants (outside New York State)
Of the 2,265 living registrants with an office in Chicago, IL, 1,775 were admitted before 2019 and 402 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 Manning Gross + Massenburg LLP42 on the register, 25 of the others admitted before 2019; 5 of the 42 give an office in Chicago, IL.
- Washington University in St. Louis School of Law graduates on the register1,878 living, 89.3% registered.
- New York-admitted attorneys in Chicago, IL2,265 living registrants give an office there.
- Admitted in 20198,536 people admitted in 2019 are on the register, 3,354 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 William Robert Irwin’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 William Robert Irwin in 2019. 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).