New York attorney record · Judicial Dept 3
William Joseph O'Brien
Catholic University alumna, admitted to the New York bar in 2004, registered office in Philadelphia, PA. This established record's status, address, and registration history come straight from the NY Office of Court Administration.
- 2004
- Admitted
- 22
- Years in bar
- 4244711
- NY reg #
The record in one line
William Joseph O'Brien appears in the New York attorney register with a current status of "Due to reregister within 30 days of birthday", on record since 2004 - an administrative designation rather than discipline, but confirm current standing with the state bar.
- 22 yrs
- since first admission to the bar
- Pending-renewal
- current bar status: "Due to reregister within 30 days of birthday"
- #598 of 1,853
- by tenure in Philadelphia office peers
- Law school
- Catholic University
Data updated September 2026
What this profile tells you
Bar status & tenure
William Joseph O'Brien is registered as bar number 4244711 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 3, the appellate division overseeing this attorney's home district.
Practice context & education
Practice address is listed under O'Brien Firm PC, located in Philadelphia, PA, ZIP 19106. Educational background: CATHOLIC UNIVERSITY.
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 Philadelphia, PA office peers
William Joseph O'Brien is earlier in the Philadelphia, PA office cohort than most peers: local tenure rank #598 of 1,853 (32nd percentile). See the Philadelphia attorney directory .
- Local rank
- #598
- City cohort
- 1,853
- Local percentile
- 32nd
- Admitted
- 2004
Nearest tenure peers in Philadelphia
- Tomachukwu Nnadiuto Acholonu admitted 2004 · 22 yr
- Kimberly Beth Altschuler admitted 2004 · 22 yr
- Timothy B Anderson admitted 2004 · 22 yr
- John Frederick Barrett admitted 2004 · 22 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 William compares to fellow Catholic University alumni
Among the 207 Catholic University graduates in the New York register, William Joseph O'Brien is longer-tenured than 9%.
22 years vs. Catholic University alumni
Years since admission - 207 NY-registered alumni of this school
22 Top 91% higher than 9% of 207 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
The 2004 admission class today
Of the 8,407 attorneys admitted to the New York bar in 2004, 65.2% are still "Currently registered" today, below the statewide average across all admission years.
Professional Details
- Status
- Due to reregister within 30 days of birthday
- Registration Number
- 4244711
- Year Admitted
- 2004 (22 yrs · senior)
- Judicial Department
- 3
- Next Registration
- Aug 2026
Location & Contact
- Company
- O'Brien Firm PC
- City
- Philadelphia, PA
- ZIP Code
- 19106
- Phone
- (267) 758-6029
Education
CATHOLIC UNIVERSITY
Status Distribution Across the New York Bar
William Joseph O'Brien'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 Catholic University alumni
Fellow alumni on the NY register whose admission year is closest to 2004 (excluding same-firm colleagues above).
Same admission year (2004), other cities
NY-registered attorneys admitted in 2004 whose listed office city differs from Philadelphia, a vintage cohort, not a neighborhood list.
Nationwide attorneys with similar admission year or city registry density
Two non-geo peer axes for William Joseph O'Brien: closest NY bar admission year outside PA, and closest out-of-state office cities by how many NY-registered attorneys they list (~1,854 here). Distinct from same-firm, fellow-alumni, and same-year other-city strips above.
Similar admission year (~2004)
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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William Joseph O'Brien 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 William O'Brien licensed?
William O'Brien is licensed to practice law in New York.
When was William Joseph O'Brien admitted to the bar?
William Joseph O'Brien was admitted to the bar in 2004.
Where did William Joseph O'Brien go to law school?
William Joseph O'Brien attended CATHOLIC UNIVERSITY.
What company does William Joseph O'Brien work for?
William Joseph O'Brien is associated with O'Brien Firm PC in Philadelphia, PA.
Is William Joseph O'Brien in good standing?
Not currently, William Joseph O'Brien'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.