New York attorney record
Mary Regina McMahon
Mary Regina McMahon is an attorney registered with the NYS Office of Court Administration (OCA) Attorney Registration Unit under bar number 4316626, admitted in 2005. The current public license status is "Currently registered" as of 2026-06-13.
Active license with no disbarment or suspension of record.
The current license status of record is active, and no disbarment or suspension is reflected in the public record we hold.
A summary of the public record — not a rating of skill, not a recommendation, not legal advice.
Experience vs. active New York attorneys
State median: 20 yrs
21 yrs admitted — more experience than ~52% of active New York attorneys.
Years since admission, active New York attorneys with a published admission year (n = 333,133). This attorney's band is highlighted.
License & registration
| Full name | Mary Regina McMahon |
|---|---|
| Bar / registration number | 4316626 |
| License status | Active official status of record: “Currently registered” |
| Admission year | 2005 |
| Law school | University of London |
| Business location | New York, NY |
| Firm | Sullivan and Cromwell LLP |
| Discipline standing | No disbarment or suspension is reflected in the current public status. Itemized disciplinary orders are not yet integrated for New York; see the official source for the full record. |
Federal court activity
Federal court activity has not been compiled for this attorney yet.
Source & last updated
Source: NYS Office of Court Administration (OCA) Attorney Registration Unit — official attorney record. As of 2026-06-13 (last roster ingest).
Frequently asked questions
Is Mary Regina McMahon a licensed attorney in New York?
Mary Regina McMahon is registered with the NYS Office of Court Administration (OCA) Attorney Registration Unit under bar number 4316626. The current public license status of record is "Currently registered" as of 2026-06-13.
Has Mary Regina McMahon been disbarred or suspended?
No disbarment or suspension is reflected in Mary Regina McMahon's current public license status of record per the NYS Office of Court Administration (OCA) Attorney Registration Unit.
What is Mary Regina McMahon's bar number?
Mary Regina McMahon's New York bar/registration number is 4316626, assigned by the NYS Office of Court Administration (OCA) Attorney Registration Unit. A bar number is the most reliable way to confirm you have the right attorney, especially for common names.
When was Mary Regina McMahon admitted to practice law?
Mary Regina McMahon was admitted in 2005 — about 21 years since admission per the NYS Office of Court Administration (OCA) Attorney Registration Unit. Law school of record: University of London.
Where is Mary Regina McMahon's law office?
The NYS Office of Court Administration (OCA) Attorney Registration Unit record lists a business location of New York, NY and the firm Sullivan and Cromwell LLP for Mary Regina McMahon. Phone and email are not published in the public roster.
For attorneys
Is this your record?
Claim it to request corrections or add your practice details. Submit your info and we'll email you the verification steps right away — our team reviews claims within 1–2 business days.
This site republishes official public records and is not legal advice, a lawyer referral service, or a consumer reporting agency. Information here may not be used to make decisions about employment, tenancy, or credit (FCRA). Records are shown as published by their official sources and may contain errors or be out of date; consult the linked official source to verify. To correct or dispute a record, contact the licensing authority of record.