New York attorney record · Judicial Dept 3
Matthew Warren O'Neil
Cornell Law School alumna, admitted to the New York bar in 2016, registered office in Syracuse, NY. This record's status, address, and registration history come straight from the NY Office of Court Administration.
- 2016
- Admitted
- 10
- Years in bar
- 5417605
- NY reg #
The record in one line
Matthew Warren O'Neil appears in the New York attorney register with a current status of "Due to reregister within 30 days of birthday", on record since 2016 - an administrative designation rather than discipline, but confirm current standing with the state bar.
- 10 yrs
- since first admission to the bar
- Pending-renewal
- current bar status: "Due to reregister within 30 days of birthday"
- #1267 of 1,636
- by tenure in Syracuse office peers
- Law school
- Cornell Law School
Data updated September 2026
What this profile tells you
Bar status & tenure
Matthew Warren O'Neil is registered as bar number 5417605 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 Costello Cooney & Fearon PLLC, located in Syracuse, NY (Onondaga County), ZIP 13202. 5 other attorneys share this firm affiliation in the registry. Educational background: Cornell Law School (8,118 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 Syracuse, NY office peers
Among the 1,636 NY-registered attorneys with a listed office in Syracuse, NY, Matthew Warren O'Neil ranks #1,267 by tenure, longer-tenured than 77% of that city cohort. See the Syracuse attorney directory .
- Local rank
- #1,267
- City cohort
- 1,636
- Local percentile
- 77th
- Admitted
- 2016
Nearest tenure peers in Syracuse
- Jeffrey David Albert admitted 2016 · 10 yr
- Kayla A. Arias admitted 2016 · 10 yr
- Cameron T. Bernard admitted 2016 · 10 yr
- Patrick Russell Blood admitted 2016 · 10 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 Matthew compares to fellow Cornell Law School alumni
Among the 4,487 Cornell Law School graduates in the New York register, Matthew Warren O'Neil is longer-tenured than 39%.
10 years vs. Cornell Law School alumni
Years since admission - 4,487 NY-registered alumni of this school
10 Top 61% higher than 39% of 4,487 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
Cornell Law School's active-bar rate
Of Cornell Law School's 8,118 alumni in the New York register, 65.1% currently hold "Currently registered" status, below the statewide average.
The 2016 admission class today
Of the 8,420 attorneys admitted to the New York bar in 2016, 72.9% 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
- 5417605
- Year Admitted
- 2016 (10 yrs · mid-career)
- Judicial Department
- 3
- Next Registration
- Aug 2026
Location & Contact
- Company
- Costello Cooney & Fearon PLLC
- City
- Syracuse, NY
- County
- Onondaga
- ZIP Code
- 13202
- Phone
- (315) 422-1152
Education
Status Distribution Across the New York Bar
Matthew Warren O'Neil'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.
Same firm affiliation: Costello Cooney & Fearon PLLC
Other NY-registered attorneys who share this firm name on the OCA register (not a geographic peer set).
Near-tenure Cornell Law School alumni
Fellow alumni on the NY register whose admission year is closest to 2016 (excluding same-firm colleagues above).
Same admission year (2016), other cities
NY-registered attorneys admitted in 2016 whose listed office city differs from Syracuse, a vintage cohort, not a neighborhood list.
Nationwide attorneys with similar admission year or city registry density
Two non-geo peer axes for Matthew Warren O'Neil: closest NY bar admission year outside NY, and closest out-of-state office cities by how many NY-registered attorneys they list (~1,637 here). Distinct from same-firm, fellow-alumni, and same-year other-city strips above.
Similar admission year (~2016)
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 Syracuse, NY
Compare credentials side-by-side
Compare Matthew Warren O'Neil with similar attorneys in Syracuse.
Compare attorneys →Before you rely on this record
Matthew Warren O'Neil 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 Matthew O'Neil licensed?
Matthew O'Neil is licensed to practice law in New York.
When was Matthew Warren O'Neil admitted to the bar?
Matthew Warren O'Neil has been on the New York bar register since 2016.
Where did Matthew Warren O'Neil go to law school?
Matthew Warren O'Neil attended Cornell Law School.
What company does Matthew Warren O'Neil work for?
Matthew Warren O'Neil is associated with Costello Cooney & Fearon PLLC in Syracuse, NY.
Is Matthew Warren O'Neil in good standing?
Not currently, Matthew Warren O'Neil'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.