New York attorney record · Judicial Dept 1
Mitchell B. Kleinman
New York University School Of Law alumna, admitted to the New York bar in 1979, registered office in New York, NY. A half-lifetime's worth of status, address, and registration history on this record come straight from the NY Office of Court Administration.
- 1979
- Admitted
- 47
- Years in bar
- 1229442
- NY reg #
The record in one line
Mitchell B. Kleinman has spent 47 years on the register since admission in 1979, one of the longest-standing active practitioners the state bar carries at 92% tenure percentile.
- 47 yrs
- in active practice since admission
- Active
- current bar status: "Currently registered"
- #4431 of 93,608
- by tenure in New York office peers
- Law school
- New York University School Of Law
Data updated August 2026
What this profile tells you
Bar status & tenure
Mitchell B. Kleinman has carried New York bar registration 1229442 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 Sidley Austin LLP, located in New York, NY (New York County), ZIP 10019. 5 other attorneys share this firm affiliation in the registry. Educational background: New York University School of Law (26,122 registered alumni).
State context & due diligence
Across a career spanning 47 years, Mitchell B. Kleinman 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
Mitchell B. Kleinman's 47 years since a 1979 admission places this record near the far edge of the statewide tenure curve below.
47 years on the New York bar
Years since admission, all currently-active NY attorneys
47 Top 8% higher than 92% 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 · August 2026
Tenure among New York, NY office peers
Mitchell B. Kleinman is earlier in the New York, NY office cohort than most peers: local tenure rank #4,431 of 93,608 (5th percentile). See the New York attorney directory .
- Local rank
- #4,431
- City cohort
- 93,608
- Local percentile
- 5th
- Admitted
- 1979
Nearest tenure peers in New York
- Barry R. Abbott admitted 1979 · 47 yr
- Richard Mark Aborn admitted 1979 · 47 yr
- Carol Rose Abramson admitted 1979 · 47 yr
- Jeffrey George Abrandt admitted 1979 · 47 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 August 2026. Derived local rank, not published upstream.
How Mitchell compares to fellow New York University School Of Law alumni
Among the 13,427 New York University School Of Law graduates in the New York register, Mitchell B. Kleinman is longer-tenured than 99%.
47 years vs. New York University School Of Law alumni
Years since admission - 13,427 NY-registered alumni of this school
47 Top 1% higher than 99% of 13,427 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 · August 2026
The 1979 admission class today
Of the 3,974 attorneys admitted to the New York bar in 1979, 53.9% are still "Currently registered" today, below the statewide average across all admission years.
Professional Details
- Status
- Currently registered
- Registration Number
- 1229442
- Year Admitted
- 1979 (47 yrs · veteran)
- Judicial Department
- 1
- Next Registration
- Feb 2028
Location & Contact
- Company
- Sidley Austin LLP
- City
- New York, NY
- County
- New York
- ZIP Code
- 10019
- Phone
- (212) 839-5688
Education
Status Distribution Across the New York Bar
Mitchell B. Kleinman'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.
Other Attorneys at Sidley Austin LLP
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Compare attorneys →Before you rely on this record
Mitchell B. Kleinman'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 Mitchell Kleinman licensed?
Mitchell Kleinman is licensed to practice law in New York.
When was Mitchell B. Kleinman admitted to the bar?
Mitchell B. Kleinman's admission to the New York bar dates back to 1979.
Where did Mitchell B. Kleinman go to law school?
Mitchell B. Kleinman attended New York University School of Law.
What company does Mitchell B. Kleinman work for?
Mitchell B. Kleinman is associated with Sidley Austin LLP in New York, NY.
Is Mitchell B. Kleinman in good standing?
Yes, Mitchell B. Kleinman 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.