New York attorney record · Judicial Dept 2
Sean Lai Mcmahon
New York University School Of Law alumna, admitted to the New York bar in 2015, registered office in San Francisco, CA. This record's status, address, and registration history come straight from the NY Office of Court Administration.
- 2015
- Admitted
- 11
- Years in bar
- 5312400
- NY reg #
The record in one line
Sean Lai Mcmahon appears in the New York attorney register with a current status of "Due to reregister within 30 days of birthday", on record since 2015 - an administrative designation rather than discipline, but confirm current standing with the state bar.
- 11 yrs
- since first admission to the bar
- Pending-renewal
- current bar status: "Due to reregister within 30 days of birthday"
- #1789 of 2,460
- by tenure in San Francisco office peers
- Law school
- New York University School Of Law
Data updated September 2026
What this profile tells you
Bar status & tenure
Sean Lai Mcmahon is registered as bar number 5312400 with the New York bar authority, carrying a current status of "Due to reregister within 30 days of birthday", a routine periodic-renewal reminder, not discipline. Registration is recorded within Judicial Department 2, the appellate division overseeing this attorney's home district.
Practice context & education
Practice address is listed under Mission Action, located in San Francisco, CA, ZIP 94110. Educational background: New York University School of Law (26,345 registered alumni).
State context & due diligence
A "Due to reregister within 30 days of birthday" status falls outside the New York bar's active cohort for now. The breakdown below shows what share of the register that represents.
Tenure among San Francisco, CA office peers
Sean Lai Mcmahon's 11-year NY register tenure places mid-pack in San Francisco, CA: rank #1,789 of 2,460 office peers (73rd percentile). See the San Francisco attorney directory .
- Local rank
- #1,789
- City cohort
- 2,460
- Local percentile
- 73rd
- Admitted
- 2015
Nearest tenure peers in San Francisco
- Francis John Acott admitted 2015 · 11 yr
- Walter P. Alarkon admitted 2015 · 11 yr
- Christopher James Asta admitted 2015 · 11 yr
- Matthew Russell Baker admitted 2015 · 11 yr
How local rank is computed
Rank uses years since NY-bar admission among non-deceased registry rows that list the same office city and state, a local placement, not a statewide claim. Source: NY Office of Court Administration Attorney Registration · as of September 2026. Derived local rank, not published upstream.
How Sean compares to fellow New York University School Of Law alumni
Among the 13,607 New York University School Of Law graduates in the New York register, Sean Lai Mcmahon is longer-tenured than 36%.
11 years vs. New York University School Of Law alumni
Years since admission - 13,607 NY-registered alumni of this school
11 Top 64% higher than 36% of 13,607 fellow alumni
Each bar is a band; taller bars hold more fellow alumni. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NY Office of Court Administration, Attorney Registration · September 2026
New York University School Of Law's active-bar rate
Of New York University School Of Law's 26,345 alumni in the New York register, 64.9% currently hold "Currently registered" status, below the statewide average.
The 2015 admission class today
Of the 8,867 attorneys admitted to the New York bar in 2015, 93% are still "Currently registered" today, above the statewide average across all admission years.
Professional Details
- Status
- Due to reregister within 30 days of birthday
- Registration Number
- 5312400
- Year Admitted
- 2015 (11 yrs · mid-career)
- Judicial Department
- 2
- Next Registration
- Nov 2025
Location & Contact
- Company
- Mission Action
- City
- San Francisco, CA
- ZIP Code
- 94110
- Phone
- (415) 877-7765
Education
Status Distribution Across the New York Bar
Sean Lai Mcmahon's current status, "Due to reregister within 30 days of birthday", places this record outside the 67.2% of the 432,625-attorney New York register currently marked active.
Full statewide breakdown & source note
Source: NY Office of Court Administration, Attorney Registrations. Status counts reflect the latest reporting cycle. Bar status confirms registration only; it does not imply competence, specialty fit, or freedom from complaints.
Near-tenure New York University School Of Law alumni
Fellow alumni on the NY register whose admission year is closest to 2015 (excluding same-firm colleagues above).
Same admission year (2015), other cities
NY-registered attorneys admitted in 2015 whose listed office city differs from San Francisco, a vintage cohort, not a neighborhood list.
Nationwide attorneys with similar admission year or city registry density
Two non-geo peer axes for Sean Lai Mcmahon: closest NY bar admission year outside CA, and closest out-of-state office cities by how many NY-registered attorneys they list (~2,461 here). Distinct from same-firm, fellow-alumni, and same-year other-city strips above.
Similar admission year (~2015)
Counts come from the NY State Office of Court Administration registration extract; peers are not a competence or practice-area ranking.
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Compare attorneys →Before you rely on this record
Sean Lai Mcmahon is currently listed as "Due to reregister within 30 days of birthday", treat that as a registration fact to confirm, not a verdict on quality.
Frequently Asked Questions
Where is Sean Mcmahon licensed?
Sean Mcmahon is licensed to practice law in New York.
When was Sean Lai Mcmahon admitted to the bar?
Sean Lai Mcmahon has been on the New York bar register since 2015.
Where did Sean Lai Mcmahon go to law school?
Sean Lai Mcmahon attended New York University School of Law.
What company does Sean Lai Mcmahon work for?
Sean Lai Mcmahon is associated with Mission Action in San Francisco, CA.
Is Sean Lai Mcmahon in good standing?
Not currently, Sean Lai Mcmahon's listed status is "Due to reregister within 30 days of birthday", not active standing. Confirm current status with the state bar.
Cite this page & disclosure
Sourced from the NY Office of Court Administration, informational only, not legal advice. Full disclosure.
Read our methodology - how this data is sourced, computed, and verified.