Atty. David M Osnos

Atty. David M Osnos

David M Osnos is a lawyer practicing real estate-commercial law, taxation law, sports law and 2 other areas of law. David received a A.B. degree from Harvard College in 1953, and has been licensed for 70 years.

Washington Washington 70 yrs experience 70 year
Call (732) 360-6947 Book Appointment

Profile Summary

About David M Osnos at a glance

David M Osnos is a Counsel based in Washington, District of Columbia, practicing at Arentfox Schiff Llp. They have 70+ years of legal experience, licensed to practice since 1956. Their practice focuses on estate planning, business, real estate, tax, and securities. Admitted to practice in District of Columbia (1956). Educated at Harvard Law School (J.D., 1956) and Harvard College (A.B., 1953). Recognitions include AV Preeminent. Serands clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • David M Osnos is a lawyer practicing real estate-commercial law, taxation law, sports law and 2 other areas of law
  • David received a A.B. degree from Harvard College in 1953, and has been licensed for 70 years
  • David practices at ArentFox Schiff LLP in Washington, DC

Practice Areas Explained

David M Osnos's Areas of Practice

Each practice area below reflects the types of cases David M Osnos handles, with a brief overview of what that area of law covers.

Estate Planning & Probate

An estate planning attorney prepares wills, trusts, powers of attorney, and healthcare directives to protect your family and pass on your assets.

David M Osnos is one of 226,537 estate planning attorneys indexed nationally. Browse estate planning attorneys in District of Columbia →

Business & Corporate Law

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

David M Osnos is one of 501,317 business attorneys indexed nationally. Browse business attorneys in District of Columbia →

Real Estate Law

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

David M Osnos is one of 316,149 real estate attorneys indexed nationally. Browse real estate attorneys in District of Columbia →

Tax Law

Tax attorneys handle IRS audits, tax debt, international tax, estate planning, and tax court litigation.

David M Osnos is one of 85,302 tax attorneys indexed nationally. Browse tax attorneys in District of Columbia →

Securities Law

David M Osnos is one of 64,529 securities attorneys indexed nationally. Browse securities attorneys in District of Columbia →

Jurisdictional Context

Why local counsel matters in District of Columbia

Practicing law in District of Columbia. Legal matters in District of Columbia are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Washington are typically filed in the local municipal court or the appropriate District of Columbia state district court, depending on subject matter and amount in controversy. An attorney licensed in District of Columbia 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 District of Columbia courts without local counsel or pro hac vice admission.

Looking for additional District of Columbia attorneys? Browse all attorneys in Washington or all attorneys in District of Columbia.

Frequently Asked

Common questions about David M Osnos

Where is David M Osnos's law office located?
David M Osnos's law practice is located in Washington, District of Columbia. The firm is Arentfox Schiff Llp. You can contact the office directly through this profile page.
What practice areas does David M Osnos handle?
David M Osnos focuses on estate planning, business, real estate, tax, securities. Each practice area listed reflects experience handling cases of that type in District of Columbia.
How long has David M Osnos practiced law?
David M Osnos has 70+ years of legal experience and has been licensed since 1956.
Where did David M Osnos go to law school?
David M Osnos earned their education at (J.D., 1956); (A.B., 1953).
How can I contact David M Osnos for a consultation?
You can contact David M Osnos 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 David M Osnos received?
David M Osnos's notable recognition includes: AV Preeminent.

Education

J.D.
Harvard Law School
- 1956
A.B.
Harvard College
- 1953

Awards

AV Preeminent

Bar Admissions

District of Columbia
Admitted: 1956

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