New York attorney record · Judicial Dept 3
Robert Olin Greffenius
American University Washington College Of Law alumna, admitted to the New York bar in 2010, registered office in Washington, DC. This established record's status, address, and registration history come straight from the NY Office of Court Administration.
- 2010
- Admitted
- 16
- Years in bar
- 4796470
- NY reg #
The record in one line
Robert Olin Greffenius has held an active New York bar license for 16 years - admitted in 2010, longer-tenured than 38% of the state's currently-active attorneys.
- 16 yrs
- in active practice since admission
- Active
- current bar status: "Currently registered"
- #6414 of 12,540
- by tenure in Washington office peers
- Law school
- American University Washington College Of Law
Data updated August 2026
What this profile tells you
Bar status & tenure
Robert Olin Greffenius carries New York bar registration 4796470, an established, active practitioner in 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 Wilmer Cutler Pickering Hale & Dorr, located in Washington, DC, ZIP 20037. 5 other attorneys share this firm affiliation in the registry. Educational background: American University Washington College of Law (1,371 registered alumni).
State context & due diligence
With an established practice on record, Robert Olin Greffenius remains inside the New York bar's active cohort - see below for how that share of the register compares.
Experience vs. the active New York bar
Robert Olin Greffenius was admitted in 2010, giving 16 years on the New York register.
16 years on the New York bar
Years since admission, all currently-active NY attorneys
16 Top 62% higher than 38% 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
Robert Olin Greffenius's 16-year NY register tenure places mid-pack in Washington, DC: rank #6,414 of 12,540 office peers (51st percentile). See the Washington attorney directory .
- Local rank
- #6,414
- City cohort
- 12,540
- Local percentile
- 51st
- Admitted
- 2010
Nearest tenure peers in Washington
- Maya Abi Karam admitted 2010 · 16 yr
- Gary Dee Adamson admitted 2010 · 16 yr
- Helder Gabriel Agostinho admitted 2010 · 16 yr
- Minyoung Jinny Ahn admitted 2010 · 16 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 Robert compares to fellow American University Washington College Of Law alumni
Among the 2,716 American University Washington College Of Law graduates in the New York register, Robert Olin Greffenius is longer-tenured than 45%.
16 years vs. American University Washington College Of Law alumni
Years since admission - 2,716 NY-registered alumni of this school
16 Top 55% higher than 45% of 2,716 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
American University Washington College Of Law's active-bar rate
Of American University Washington College Of Law's 1,371 alumni in the New York register, 87.3% currently hold "Currently registered" status, above the statewide average.
The 2010 admission class today
Of the 10,128 attorneys admitted to the New York bar in 2010, 69.6% are still "Currently registered" today, above the statewide average across all admission years.
Professional Details
- Status
- Currently registered
- Registration Number
- 4796470
- Year Admitted
- 2010 (16 yrs · senior)
- Judicial Department
- 3
- Next Registration
- Mar 2028
Location & Contact
- Company
- Wilmer Cutler Pickering Hale & Dorr
- City
- Washington, DC
- ZIP Code
- 20037
- Phone
- (202) 663-6108
Status Distribution Across the New York Bar
Robert Olin Greffenius'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: Wilmer Cutler Pickering Hale & Dorr
Other NY-registered attorneys who share this firm name on the OCA register (not a geographic peer set).
Near-tenure American University Washington College Of Law alumni
Fellow alumni on the NY register whose admission year is closest to 2010 (excluding same-firm colleagues above).
Same admission year (2010), other cities
NY-registered attorneys admitted in 2010 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 Robert Olin Greffenius: 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 (~2010)
Counts come from the NY State Office of Court Administration registration extract; peers are not a competence or practice-area ranking.
Verify This Attorney
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Compare attorneys →Before you rely on this record
Robert Olin Greffenius'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 Robert Greffenius licensed?
Robert Greffenius is licensed to practice law in New York.
When was Robert Olin Greffenius admitted to the bar?
Robert Olin Greffenius was admitted to the bar in 2010.
Where did Robert Olin Greffenius go to law school?
Robert Olin Greffenius attended American University Washington College of Law.
What company does Robert Olin Greffenius work for?
Robert Olin Greffenius is associated with Wilmer Cutler Pickering Hale & Dorr in Washington, DC.
Is Robert Olin Greffenius in good standing?
Yes, Robert Olin Greffenius 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.