New York attorney record · Judicial Dept 3
Mark Christopher Nielsen
Suny At Buffalo alumna, admitted to the New York bar in 1997, registered office in Washington, DC. Decades of status, address, and registration history on this record come straight from the NY Office of Court Administration.
- 1997
- Admitted
- 29
- Years in bar
- 2821957
- NY reg #
The record in one line
With 29 years on the register since a 1997 admission, Mark Christopher Nielsen ranks among the New York bar's most senior active practitioners, longer-tenured than 62% of the currently-active bar.
- 29 yrs
- in active practice since admission
- Active
- current bar status: "Currently registered"
- #2110 of 12,540
- by tenure in Washington office peers
- Law school
- Suny At Buffalo
Data updated August 2026
What this profile tells you
Bar status & tenure
Registration 2821957 with the New York bar authority has long belonged to Mark Christopher Nielsen, a veteran practitioner still in active good standing. Registration is recorded within Judicial Department 3, the appellate division overseeing this attorney's home district.
Practice context & education
Practice address is listed under Groom Law Group, Chartered, located in Washington, DC, ZIP 20006. 5 other attorneys share this firm affiliation in the registry. Educational background: SUNY AT BUFFALO (2,896 registered alumni).
State context & due diligence
After 29 years on the register, Mark Christopher Nielsen 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 Christopher Nielsen's 29 years since admission in 1997.
29 years on the New York bar
Years since admission, all currently-active NY attorneys
29 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 · August 2026
Tenure among Washington, DC office peers
Mark Christopher Nielsen is earlier in the Washington, DC office cohort than most peers: local tenure rank #2,110 of 12,540 (17th percentile). See the Washington attorney directory .
- Local rank
- #2,110
- City cohort
- 12,540
- Local percentile
- 17th
- Admitted
- 1997
Nearest tenure peers in Washington
- Olushola Helen Awoyera admitted 1997 · 29 yr
- Gary Evan Bacher admitted 1997 · 29 yr
- Angel Eduardo Balarezo admitted 1997 · 29 yr
- Evan C. Baranoff admitted 1997 · 29 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 Mark compares to fellow Suny At Buffalo alumni
Among the 1,234 Suny At Buffalo graduates in the New York register, Mark Christopher Nielsen is longer-tenured than 10%.
29 years vs. Suny At Buffalo alumni
Years since admission - 1,234 NY-registered alumni of this school
29 Top 90% higher than 10% of 1,234 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
Suny At Buffalo's active-bar rate
Of Suny At Buffalo's 2,896 alumni in the New York register, 60.5% currently hold "Currently registered" status, below the statewide average.
The 1997 admission class today
Of the 7,065 attorneys admitted to the New York bar in 1997, 81% are still "Currently registered" today, above the statewide average across all admission years.
Professional Details
- Status
- Currently registered
- Registration Number
- 2821957
- Year Admitted
- 1997 (29 yrs · veteran)
- Judicial Department
- 3
- Next Registration
- Jun 2027
Location & Contact
- Company
- Groom Law Group, Chartered
- City
- Washington, DC
- ZIP Code
- 20006
- Phone
- (202) 258-0375
Education
Status Distribution Across the New York Bar
Mark Christopher Nielsen'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: Groom Law Group, Chartered
Other NY-registered attorneys who share this firm name on the OCA register (not a geographic peer set).
Near-tenure Suny At Buffalo alumni
Fellow alumni on the NY register whose admission year is closest to 1997 (excluding same-firm colleagues above).
Same admission year (1997), other cities
NY-registered attorneys admitted in 1997 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 Mark Christopher Nielsen: 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 (~1997)
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 SearchNearby Attorneys in Washington, DC
Compare credentials side-by-side
Compare Mark Christopher Nielsen with similar attorneys in Washington.
Compare attorneys →Before you rely on this record
Mark Christopher Nielsen'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 Nielsen licensed?
Mark Nielsen is licensed to practice law in New York.
When was Mark Christopher Nielsen admitted to the bar?
Mark Christopher Nielsen's admission to the New York bar dates back to 1997.
Where did Mark Christopher Nielsen go to law school?
Mark Christopher Nielsen attended SUNY AT BUFFALO.
What company does Mark Christopher Nielsen work for?
Mark Christopher Nielsen is associated with Groom Law Group, Chartered in Washington, DC.
Is Mark Christopher Nielsen in good standing?
Yes, Mark Christopher Nielsen 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.