Atty. John P Warner

Atty. John P Warner

John P Warner is a lawyer practicing tax, business and international tax, tax litigation and 1 other area of law. John received a B.A. degree from The George Washington University in 1971, and has been licensed for 48 years.

Washington Washington 48 yrs experience 48 year
Call (443) 909-4791 Book Appointment

Profile Summary

About John P Warner at a glance

John P Warner is a Co-managing Shareholder based in Washington, District of Columbia, practicing at Buchanan Ingersoll & Rooney PC. They have 48+ years of legal experience, licensed to practice since 1978. Their practice focuses on business, tax, tax litigation, and international tax. Admitted to practice in California (1978) and District of Columbia (1980). Educated at University of California at Berkeley (J.D., 1977) and The George Washington University (B.A., 1971). Recognitions include AV Preeminent. Active member of State Bar of California District of Columbia Bar American Bar Association (Chair, Transfer Pricing Committee, Section of Taxation) United States Supreme Court Bar Association. Serands clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • John P Warner is a lawyer practicing tax, business and international tax, tax litigation and 1 other area of law
  • John received a B.A. degree from The George Washington University in 1971, and has been licensed for 48 years
  • John practices at Buchanan Ingersoll & Rooney PC in Washington, DC

Practice Areas Explained

John P Warner's Areas of Practice

Each practice area below reflects the types of cases John P Warner 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.

John P Warner is one of 501,317 business attorneys indexed nationally. Browse business attorneys in District of Columbia →

Tax Law

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

John P Warner is one of 85,302 tax attorneys indexed nationally. Browse tax attorneys in District of Columbia →

Tax Litigation

John P Warner is one of 3,110 tax litigation attorneys indexed nationally. Browse tax litigation attorneys in District of Columbia →

International Tax

John P Warner is one of 1,693 international tax attorneys indexed nationally. Browse international tax 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 John P Warner

Where is John P Warner's law office located?
John P Warner's law practice is located in Washington, District of Columbia. The firm is Buchanan Ingersoll & Rooney PC. You can contact the office directly through this profile page.
What practice areas does John P Warner handle?
John P Warner focuses on business, tax, tax litigation, international tax. Each practice area listed reflects experience handling cases of that type in District of Columbia.
How long has John P Warner practiced law?
John P Warner has 48+ years of legal experience and has been licensed since 1978.
Where did John P Warner go to law school?
John P Warner earned their education at (J.D., 1977); (B.A., 1971).
How can I contact John P Warner for a consultation?
You can contact John P Warner 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 John P Warner received?
John P Warner's notable recognition includes: AV Preeminent.

Education

J.D.
University of California at Berkeley
- 1977
B.A.
The George Washington University
- 1971

Awards

AV Preeminent

Bar Admissions

California
Admitted: 1978
District of Columbia
Admitted: 1980

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