Atty. Henry Charles Thumann

Atty. Henry Charles Thumann

Mr. Henry Charles Thumann is a lawyer practicing appeals, asia, business and 5 other areas of law.

Washington Washington 65 yrs experience 65 year
Call (771) 220-6743 Book Appointment

Profile Summary

About Henry Charles Thumann at a glance

Henry Charles Thumann is an Of Counsel based in Washington, District of Columbia, practicing at O Melveny And Myers Llp. They have 65+ years of legal experience, licensed to practice since 1961. Their practice focuses on business, white collar, environmental, health care, and appellate. Admitted to practice in California (1961) and District of Columbia (2001). Educated at University of Illinois (B.S., 1957) and Harvard University LL.B. magna cum laude Harvard University LL.B. 1960 Law Review Harvard University LL.B. 1958-1960 (—). Recognitions include AV Preeminent. Serands clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mr. Henry Charles Thumann is a lawyer practicing appeals, asia, business and 5 other areas of law
  • Henry received a B.S. degree from University of Illinois in 1957, and has been licensed for 65 years
  • Henry practices at O'Melveny & Myers LLP in Washington, DC

Practice Areas Explained

Henry Charles Thumann's Areas of Practice

Each practice area below reflects the types of cases Henry Charles Thumann handles, with a brief overview of what that area of law covers.

Business & Corporate Law

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

Henry Charles Thumann is one of 501,317 business attorneys indexed nationally. Browse business attorneys in District of Columbia →

White Collar Crimes

Henry Charles Thumann is one of 20,025 white collar attorneys indexed nationally. Browse white collar attorneys in District of Columbia →

Environmental Law

Environmental attorneys for regulatory compliance, contamination, land use, and natural resource law.

Henry Charles Thumann is one of 56,434 environmental attorneys indexed nationally. Browse environmental attorneys in District of Columbia →

Health Care Law

Health care attorneys for HIPAA, Medicare, Medicaid, regulatory compliance, and medical licensing matters.

Henry Charles Thumann is one of 66,735 health care attorneys indexed nationally. Browse health care attorneys in District of Columbia →

Appellate Practice

Appellate attorneys for civil and criminal appeals at state and federal court.

Henry Charles Thumann is one of 86,319 appellate attorneys indexed nationally. Browse appellate 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 Henry Charles Thumann

Where is Henry Charles Thumann's law office located?
Henry Charles Thumann's law practice is located in Washington, District of Columbia. The firm is O Melveny And Myers Llp. You can contact the office directly through this profile page.
What practice areas does Henry Charles Thumann handle?
Henry Charles Thumann focuses on business, white collar, environmental, health care, appellate. Each practice area listed reflects experience handling cases of that type in District of Columbia.
How long has Henry Charles Thumann practiced law?
Henry Charles Thumann has 65+ years of legal experience and has been licensed since 1961.
Where did Henry Charles Thumann go to law school?
Henry Charles Thumann earned their education at (B.S., 1957); (—).
How can I contact Henry Charles Thumann for a consultation?
You can contact Henry Charles Thumann 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 Henry Charles Thumann received?
Henry Charles Thumann's notable recognition includes: AV Preeminent.

Education

B.S.
University of Illinois
- 1957
Harvard University LL.B. magna cum laude Harvard University LL.B. 1960 Law Review Harvard University LL.B. 1958-1960
- In Progress

Awards

AV Preeminent

Bar Admissions

California
Admitted: 1961
District of Columbia
Admitted: 2001

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