Atty. Donald Allan Derfner

Atty. Donald Allan Derfner

Donald Allan Derfner is a lawyer practicing commercial, corporate & incorporation, general practice and 5 other areas of law. Donald received a B.A. degree from Michigan State University in 1965, and has been licensed for 57 years.

New York New York 57 yrs experience 57 year
Call (212) 257-3482 Book Appointment

Profile Summary

About Donald Allan Derfner at a glance

Donald Allan Derfner is a Member based in New York, New York, practicing at Derfner & Gillett, LLP. They have 57+ years of legal experience, licensed to practice since 1969. Their practice focuses on formation, discrimination, business, real estate, and class action. Admitted to practice in New York (1969), U.S. District Court, Southern District of New York (1972), U.S. District Court, Eastern District of New York and U.S. Court of Appeals, Second Circuit (1972), and U.S. Tax Court and U.S. Supreme Court (1973). Educated at Brooklyn Law School (J.D., 1968) and Michigan State University (B.A., 1965). Recognitions include AV Preeminent. Active member of The Association of the Bar of the City of New York. Serands clients in New York, NY and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Donald Allan Derfner is a lawyer practicing commercial, corporate & incorporation, general practice and 5 other areas of law
  • Donald received a B.A. degree from Michigan State University in 1965, and has been licensed for 57 years
  • Donald practices at Derfner & Gillett, LLP in New York, NY

Practice Areas Explained

Donald Allan Derfner's Areas of Practice

Each practice area below reflects the types of cases Donald Allan Derfner handles, with a brief overview of what that area of law covers.

Business Formation

Donald Allan Derfner is one of 35,584 formation attorneys indexed nationally. Browse formation attorneys in New York →

Workplace Discrimination

Donald Allan Derfner is one of 7,100 discrimination attorneys indexed nationally. Browse discrimination attorneys in New York →

Business & Corporate Law

Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.

Donald Allan Derfner is one of 501,317 business attorneys indexed nationally. Browse business attorneys in New York →

Real Estate Law

Real estate attorneys handle home purchases, sales, commercial transactions, title disputes, and landlord-tenant matters.

Donald Allan Derfner is one of 316,149 real estate attorneys indexed nationally. Browse real estate attorneys in New York →

Class Action

Donald Allan Derfner is one of 26,424 class action attorneys indexed nationally. Browse class action attorneys in New York →

Jurisdictional Context

Why local counsel matters in New York

Practicing law in New York. Legal matters in New York are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in New York are typically filed in the local municipal court or the appropriate New York state district court, depending on subject matter and amount in controversy. An attorney licensed in New York brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in New York courts without local counsel or pro hac vice admission.

Looking for additional New York attorneys? Browse all attorneys in New York or all attorneys in New York.

Frequently Asked

Common questions about Donald Allan Derfner

Where is Donald Allan Derfner's law office located?
Donald Allan Derfner's law practice is located in New York, New York. The firm is Derfner & Gillett, LLP. You can contact the office directly through this profile page.
What practice areas does Donald Allan Derfner handle?
Donald Allan Derfner focuses on formation, discrimination, business, real estate, class action. Each practice area listed reflects experience handling cases of that type in New York.
How long has Donald Allan Derfner practiced law?
Donald Allan Derfner has 57+ years of legal experience and has been licensed since 1969.
Where did Donald Allan Derfner go to law school?
Donald Allan Derfner earned their education at (J.D., 1968); (B.A., 1965).
How can I contact Donald Allan Derfner for a consultation?
You can contact Donald Allan Derfner directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.
What awards or recognition has Donald Allan Derfner received?
Donald Allan Derfner's notable recognition includes: AV Preeminent.

Education

J.D.
Brooklyn Law School
- 1968
B.A.
Michigan State University
- 1965

Awards

AV Preeminent

Bar Admissions

New York
Admitted: 1969
U.S. District Court, Southern District of New York
Admitted: 1972
U.S. District Court, Eastern District of New York and U.S. Court of Appeals, Second Circuit
Admitted: 1972
U.S. Tax Court and U.S. Supreme Court
Admitted: 1973
U.S. Court of Appeals, Seventh Circuit
Admitted: 1975
U.S. District Court, District of Connecticut
Admitted: 1982
U.S. Court of Appeals for the District of Columbia Circuit
Admitted: 1984

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