New York attorney record · Judicial Dept 3
Riley Patrick O'Brien
University Of British Columbia Faculty Of Law alumna, admitted to the New York bar in 2026, registered office in Boston, MA. As a recent entrant to the registry, this record's status, address, and admission date come straight from the NY Office of Court Administration.
- 2026
- Admitted
- 0
- Years in bar
- 6269898
- NY reg #
The record in one line
Riley Patrick O'Brien is early in an active New York law career - admitted to the bar in 2026 and on active status for 0 years so far, already ahead of 0% of the state's active bar by tenure.
- 0 yrs
- in active practice since admission
- Active
- current bar status: "Currently registered"
- #2885 of 2,912
- by tenure in Boston office peers
- Law school
- University Of British Columbia Faculty Of Law
Data updated September 2026
What this profile tells you
Bar status & tenure
Riley Patrick O'Brien holds bar number 6269898 with the New York bar authority, a recent active-status addition to the roll. Registration is recorded within Judicial Department 3, the appellate division overseeing this attorney's home district.
Practice context & education
Practice address is listed under Sidley Austin LLP, located in Boston, MA, ZIP 02109. 5 other attorneys share this firm affiliation in the registry. Educational background: University of British Columbia Faculty of Law.
State context & due diligence
As a recent addition to the register, Riley Patrick O'Brien counts toward the New York bar's active cohort; the breakdown below shows how that group stacks up against the rest of the register.
Experience vs. the active New York bar
Riley Patrick O'Brien is a recent addition to the active New York bar, admitted in 2026. The histogram below shows where 0 years of tenure falls among every currently-active attorney in the state.
0 years on the New York bar
Years since admission, all currently-active NY attorneys
0 Top 100% higher than 0% of 290,787 active NY attorneys
Each bar is a band; taller bars hold more active NY attorneys. 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
Tenure among Boston, MA office peers
Among the 2,912 NY-registered attorneys with a listed office in Boston, MA, Riley Patrick O'Brien ranks #2,885 by tenure, longer-tenured than 99% of that city cohort. See the Boston attorney directory .
- Local rank
- #2,885
- City cohort
- 2,912
- Local percentile
- 99th
- Admitted
- 2026
Nearest tenure peers in Boston
- Nuryllen Aguasvivas admitted 2026 · 0 yr
- Delilah Rose Artus admitted 2026 · 0 yr
- Joseph Phillip Beletti-Naccarato admitted 2026 · 0 yr
- Jordan Lizbeth Boggan admitted 2026 · 0 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.
The 2026 admission class today
Of the 4,923 attorneys admitted to the New York bar in 2026, 100% are still "Currently registered" today, above the statewide average across all admission years.
Professional Details
- Status
- Currently registered
- Registration Number
- 6269898
- Year Admitted
- 2026 (0 yrs · early career)
- Judicial Department
- 3
- Next Registration
- Jul 2028
Location & Contact
- Company
- Sidley Austin LLP
- City
- Boston, MA
- ZIP Code
- 02109
- Phone
- (617) 223-0310
Education
University of British Columbia Faculty of Law
Status Distribution Across the New York Bar
Riley Patrick O'Brien's current status, "Currently registered", places this attorney in 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.
Same firm affiliation: Sidley Austin LLP
Other NY-registered attorneys who share this firm name on the OCA register (not a geographic peer set).
Same admission year (2026), other cities
NY-registered attorneys admitted in 2026 whose listed office city differs from Boston, a vintage cohort, not a neighborhood list.
Nationwide attorneys with similar admission year or city registry density
Two non-geo peer axes for Riley Patrick O'Brien: closest NY bar admission year outside MA, and closest out-of-state office cities by how many NY-registered attorneys they list (~2,913 here). Distinct from same-firm, fellow-alumni, and same-year other-city strips above.
Similar admission year (~2026)
Counts come from the NY State Office of Court Administration registration extract; peers are not a competence or practice-area ranking.
Verify This Attorney
Verify on NY Courts Attorney SearchNearby Attorneys in Boston, MA
Compare credentials side-by-side
Compare Riley Patrick O'Brien with similar attorneys in Boston.
Compare attorneys →Before you rely on this record
Riley Patrick O'Brien's "Currently registered" listing confirms bar standing only, it is a registration fact to verify, not a verdict on quality or competence.
Frequently Asked Questions
Where is Riley O'Brien licensed?
Riley O'Brien is licensed to practice law in New York.
When was Riley Patrick O'Brien admitted to the bar?
Riley Patrick O'Brien was admitted to the New York bar in 2026, 0 years ago.
Where did Riley Patrick O'Brien go to law school?
Riley Patrick O'Brien attended University of British Columbia Faculty of Law.
What company does Riley Patrick O'Brien work for?
Riley Patrick O'Brien is associated with Sidley Austin LLP in Boston, MA.
Is Riley Patrick O'Brien in good standing?
Yes, Riley Patrick O'Brien holds active bar status ("Currently registered").
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.