New York attorney record · Judicial Dept 1
Simon Sidamon Eristoff
Columbia University alumna, admitted to the New York bar in 1985, registered office in Washington, DC. A half-lifetime's worth of status, address, and registration history on this record come straight from the NY Office of Court Administration.
- 1985
- Admitted
- 41
- Years in bar
- 1991967
- NY reg #
The record in one line
Simon Sidamon Eristoff has spent 41 years on the register since admission in 1985, one of the longest-standing active practitioners the state bar carries at 86% tenure percentile.
- 41 yrs
- in active practice since admission
- Active
- current bar status: "Currently registered"
- #582 of 12,540
- by tenure in Washington office peers
- Law school
- Columbia University
Data updated September 2026
What this profile tells you
Bar status & tenure
Simon Sidamon Eristoff has carried New York bar registration 1991967 for the better part of a career, still active and in good standing. Registration is recorded within Judicial Department 1, the appellate division overseeing this attorney's home district.
Practice context & education
Practice address is listed under Kalbian Hagerty LLP, located in Washington, DC, ZIP 20006. 1 other attorney shares this firm affiliation in the registry. Educational background: COLUMBIA UNIVERSITY.
State context & due diligence
Across a career spanning 41 years, Simon Sidamon Eristoff has remained part of the New York bar's active cohort, a share of the register detailed further below.
Experience vs. the active New York bar
Simon Sidamon Eristoff's 41 years since a 1985 admission places this record near the far edge of the statewide tenure curve below.
41 years on the New York bar
Years since admission, all currently-active NY attorneys
41 Top 14% higher than 86% 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 Washington, DC office peers
Simon Sidamon Eristoff is earlier in the Washington, DC office cohort than most peers: local tenure rank #582 of 12,540 (5th percentile). See the Washington attorney directory .
- Local rank
- #582
- City cohort
- 12,540
- Local percentile
- 5th
- Admitted
- 1985
Nearest tenure peers in Washington
- Motoko Aizawa admitted 1985 · 41 yr
- Agnes Karen Alexis admitted 1985 · 41 yr
- Margery F. Baker admitted 1985 · 41 yr
- Bernard Paul Bell admitted 1985 · 41 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 Simon compares to fellow Columbia University alumni
Among the 1,229 Columbia University graduates in the New York register, Simon Sidamon Eristoff is longer-tenured than 99%.
41 years vs. Columbia University alumni
Years since admission - 1,229 NY-registered alumni of this school
41 Top 1% higher than 99% of 1,229 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 1985 admission class today
Of the 6,046 attorneys admitted to the New York bar in 1985, 70.6% are still "Currently registered" today, above the statewide average across all admission years.
Professional Details
- Status
- Currently registered
- Registration Number
- 1991967
- Year Admitted
- 1985 (41 yrs · veteran)
- Judicial Department
- 1
- Next Registration
- Nov 2027
Location & Contact
- Company
- Kalbian Hagerty LLP
- City
- Washington, DC
- ZIP Code
- 20006
- Phone
- (202) 419-3299
Education
COLUMBIA UNIVERSITY
Status Distribution Across the New York Bar
Simon Sidamon Eristoff'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: Kalbian Hagerty LLP
Other NY-registered attorneys who share this firm name on the OCA register (not a geographic peer set).
View all attorneys at this firm →Near-tenure Columbia University alumni
Fellow alumni on the NY register whose admission year is closest to 1985 (excluding same-firm colleagues above).
Same admission year (1985), other cities
NY-registered attorneys admitted in 1985 whose listed office city differs from Washington, a vintage cohort, not a neighborhood list.
Nationwide attorneys with similar admission year or city registry density
Two non-geo peer axes for Simon Sidamon Eristoff: closest NY bar admission year outside DC, and closest out-of-state office cities by how many NY-registered attorneys they list (~12,541 here). Distinct from same-firm, fellow-alumni, and same-year other-city strips above.
Similar admission year (~1985)
Counts come from the NY State Office of Court Administration registration extract; peers are not a competence or practice-area ranking.
Verify This Attorney
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Compare Simon Sidamon Eristoff with similar attorneys in Washington.
Compare attorneys →Before you rely on this record
Simon Sidamon Eristoff'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 Simon Sidamon Eristoff licensed?
Simon Sidamon Eristoff is licensed to practice law in New York.
When was Simon Sidamon Eristoff admitted to the bar?
Simon Sidamon Eristoff's admission to the New York bar dates back to 1985.
Where did Simon Sidamon Eristoff go to law school?
Simon Sidamon Eristoff attended COLUMBIA UNIVERSITY.
What company does Simon Sidamon Eristoff work for?
Simon Sidamon Eristoff is associated with Kalbian Hagerty LLP in Washington, DC.
Is Simon Sidamon Eristoff in good standing?
Yes, Simon Sidamon Eristoff 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.