New York attorney record · Judicial Dept 2
Dean Shaun Mastrangelo
Roger Williams alumna, admitted to the New York bar in 1999, registered office in Syosset, NY. Decades of status, address, and registration history on this record come straight from the NY Office of Court Administration.
- 1999
- Admitted
- 27
- Years in bar
- 2931087
- NY reg #
The record in one line
With 27 years on the register since a 1999 admission, Dean Shaun Mastrangelo ranks among the New York bar's most senior active practitioners, longer-tenured than 61% of the currently-active bar.
- 27 yrs
- in active practice since admission
- Active
- current bar status: "Currently registered"
- Top 39%
- by tenure among active NY attorneys
- Law school
- Roger Williams
Data updated May 2026
What this profile tells you
Bar status & tenure
Registration 2931087 with the New York bar authority has long belonged to Dean Shaun Mastrangelo, a veteran practitioner still in active good standing. Registration is recorded within Judicial Department 2, the appellate division overseeing this attorney's home district.
Practice context & education
Practice address is listed under Law Office Of Dean Mastrangelo PC, located in Syosset, NY (Nassau County), ZIP 11791. Educational background: ROGER WILLIAMS (19 registered alumni).
State context & due diligence
After 27 years on the register, Dean Shaun Mastrangelo still falls within the New York bar's active cohort, a share of the register detailed further below.
Experience vs. the active New York bar
Few active New York attorneys match Dean Shaun Mastrangelo's 27 years since admission in 1999. The histogram plots that tenure against every currently-active attorney in the state.
27 years on the New York bar
Years since admission, all currently-active NY attorneys
27 Top 39% higher than 61% 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
Roger Williams's active-bar rate
Of Roger Williams's 19 alumni in the New York register, 52.6% currently hold "Currently registered" status, below the statewide average.
Roger Williams alumni, active-bar rate
The 1999 admission class today
Of the 7,628 attorneys admitted to the New York bar in 1999, 79.4% are still "Currently registered" today, above the statewide average across all admission years.
Professional Details
- Status
- Currently registered
- Registration Number
- 2931087
- Year Admitted
- 1999 (27 yrs · veteran)
- Judicial Department
- 2
- Next Registration
- Sep 2027
Location & Contact
- Company
- Law Office Of Dean Mastrangelo PC
- City
- Syosset, NY
- County
- Nassau
- ZIP Code
- 11791
- Phone
- (516) 693-0330
Education
Status Distribution Across the New York Bar
Dean Shaun Mastrangelo'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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Compare attorneys →Before you rely on this record
Dean Shaun Mastrangelo'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 Dean Mastrangelo licensed?
Dean Mastrangelo is licensed to practice law in New York.
When was Dean Shaun Mastrangelo admitted to the bar?
Dean Shaun Mastrangelo's admission to the New York bar dates back to 1999.
Where did Dean Shaun Mastrangelo go to law school?
Dean Shaun Mastrangelo attended ROGER WILLIAMS.
What company does Dean Shaun Mastrangelo work for?
Dean Shaun Mastrangelo is associated with Law Office Of Dean Mastrangelo PC in Syosset, NY.
Is Dean Shaun Mastrangelo in good standing?
Yes, Dean Shaun Mastrangelo 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.