New York attorney record · Judicial Dept 1
Mark John Leemen
University Of Sydney alumna, admitted to the New York bar in 2001. Decades of status, address, and registration history on this record come straight from the NY Office of Court Administration.
- 2001
- Admitted
- 25
- Years in bar
- 3984689
- NY reg #
The record in one line
With 25 years on the register since a 2001 admission, Mark John Leemen ranks among the New York bar's most senior active practitioners, longer-tenured than 62% of the currently-active bar.
- 25 yrs
- in active practice since admission
- Active
- current bar status: "Currently registered"
- Top 38%
- by tenure among active NY attorneys
- Law school
- University Of Sydney
Data updated September 2026
What this profile tells you
Bar status & tenure
Registration 3984689 with the New York bar authority has long belonged to Mark John Leemen, a veteran practitioner still in active 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 Allen Overy Shearman Sterling, located in Sydney Nsw 2000. 5 other attorneys share this firm affiliation in the registry. Educational background: UNIVERSITY OF SYDNEY (112 registered alumni).
State context & due diligence
After 25 years on the register, Mark John Leemen 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 Mark John Leemen's 25 years since admission in 2001.
25 years on the New York bar
Years since admission, all currently-active NY attorneys
25 Top 38% higher than 62% 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
How Mark compares to fellow University Of Sydney alumni
Among the 64 University Of Sydney graduates in the New York register, Mark John Leemen is longer-tenured than 66%.
25 years vs. University Of Sydney alumni
Years since admission - 64 NY-registered alumni of this school
25 Top 34% higher than 66% of 64 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
University Of Sydney's active-bar rate
Of University Of Sydney's 112 alumni in the New York register, 71.4% currently hold "Currently registered" status, above the statewide average.
The 2001 admission class today
Of the 7,416 attorneys admitted to the New York bar in 2001, 82.5% are still "Currently registered" today, above the statewide average across all admission years.
Professional Details
- Status
- Currently registered
- Registration Number
- 3984689
- Year Admitted
- 2001 (25 yrs · veteran)
- Judicial Department
- 1
- Next Registration
- Sep 2027
Location & Contact
- Company
- Allen Overy Shearman Sterling
- City
- Sydney Nsw 2000
- Phone
- 61293737644
Education
Status Distribution Across the New York Bar
Mark John Leemen'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: Allen Overy Shearman Sterling
Other NY-registered attorneys who share this firm name on the OCA register (not a geographic peer set).
Near-tenure University Of Sydney alumni
Fellow alumni on the NY register whose admission year is closest to 2001 (excluding same-firm colleagues above).
Same admission year (2001), other cities
NY-registered attorneys admitted in 2001 whose listed office city differs from Sydney Nsw 2000, a vintage cohort, not a neighborhood list.
Nationwide attorneys with similar admission year or city registry density
Out-of-state NY bar peers for Mark John Leemen with the closest admission year to 2001. Distinct from same-firm, fellow-alumni, and same-year other-city strips above.
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 SearchBefore you rely on this record
Mark John Leemen'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 Mark Leemen licensed?
Mark Leemen is licensed to practice law in New York.
When was Mark John Leemen admitted to the bar?
Mark John Leemen's admission to the New York bar dates back to 2001.
Where did Mark John Leemen go to law school?
Mark John Leemen attended UNIVERSITY OF SYDNEY.
What company does Mark John Leemen work for?
Mark John Leemen is associated with Allen Overy Shearman Sterling in Sydney Nsw 2000.
Is Mark John Leemen in good standing?
Yes, Mark John Leemen 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.