New York attorney record · Judicial Dept 1
Nicholas Collinge Cassin
London School Of Economics alumna, admitted to the New York bar in 2013, registered office in New York, NY. This record's status, address, and registration history come straight from the NY Office of Court Administration.
- 2013
- Admitted
- 13
- Years in bar
- 5175880
- NY reg #
The record in one line
Admitted in 2013, Nicholas Collinge Cassin has built 13 years of active New York practice - more tenure than 24% of the state's currently-active attorneys.
- 13 yrs
- in active practice since admission
- Active
- current bar status: "Currently registered"
- Top 76%
- by tenure among active NY attorneys
- Law school
- London School Of Economics
Data updated May 2026
What this profile tells you
Bar status & tenure
Bar number 5175880 on the New York register belongs to Nicholas Collinge Cassin, currently in active 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, located in New York, NY (New York County), ZIP 10019. 5 other attorneys share this firm affiliation in the registry. Educational background: London School of Economics (60 registered alumni).
State context & due diligence
Nicholas Collinge Cassin is currently part of the New York bar's active cohort, a group the breakdown below sizes against the full register.
Experience vs. the active New York bar
13 years into an active New York practice since a 2013 admission, Nicholas Collinge Cassin sits here on the statewide experience curve - taller bars hold more attorneys at that experience level.
13 years on the New York bar
Years since admission, all currently-active NY attorneys
13 Top 76% higher than 24% of 284,296 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 · May 2026
London School Of Economics's active-bar rate
Of London School Of Economics's 60 alumni in the New York register, 73.3% currently hold "Currently registered" status, above the statewide average.
London School Of Economics alumni, active-bar rate
The 2013 admission class today
Of the 10,251 attorneys admitted to the New York bar in 2013, 87.8% are still "Currently registered" today, above the statewide average across all admission years.
Professional Details
- Status
- Currently registered
- Registration Number
- 5175880
- Year Admitted
- 2013 (13 yrs · mid-career)
- Judicial Department
- 1
- Next Registration
- Nov 2027
Location & Contact
- Company
- Sidley Austin
- City
- New York, NY
- County
- New York
- ZIP Code
- 10019
- Phone
- (212) 839-5640
Education
Status Distribution Across the New York Bar
Nicholas Collinge Cassin's current status, "Currently registered", places this attorney in the 66.2% of the 429,620-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.
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Nicholas Collinge Cassin'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 Nicholas Cassin licensed?
Nicholas Cassin is licensed to practice law in New York.
When was Nicholas Collinge Cassin admitted to the bar?
Nicholas Collinge Cassin has been on the New York bar register since 2013.
Where did Nicholas Collinge Cassin go to law school?
Nicholas Collinge Cassin attended London School of Economics.
What company does Nicholas Collinge Cassin work for?
Nicholas Collinge Cassin is associated with Sidley Austin in New York, NY.
Is Nicholas Collinge Cassin in good standing?
Yes, Nicholas Collinge Cassin holds active bar status ("Currently registered").
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.