Atty. Peter Gabor Haller

Atty. Peter Gabor Haller

Peter Gabor Haller is a lawyer practicing tax, administrative law. Peter received a B.S. degree from Carnegie Mellon University in 1995, and has been licensed for 25 years.

Washington Washington 25 yrs experience 25 year
Call (771) 216-9251 Book Appointment

Profile Summary

About Peter Gabor Haller at a glance

Peter Gabor Haller is an Associate based in Washington, District of Columbia, practicing at Stone Mattheis Xenopoulos And Brew Pc. They have 25+ years of legal experience, licensed to practice since 2001. Their practice focuses on tax and government. Admitted to practice in New York (2001) and District of Columbia (2008). Educated at George Washington University Law School (J.D., 2000) and Carnegie Mellon University (B.S., 1995). Serands clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Peter Gabor Haller is a lawyer practicing tax, administrative law
  • Peter received a B.S. degree from Carnegie Mellon University in 1995, and has been licensed for 25 years
  • Peter practices at Stone Mattheis Xenopoulos & Brew, PC in Washington, DC

Practice Areas Explained

Peter Gabor Haller's Areas of Practice

Each practice area below reflects the types of cases Peter Gabor Haller handles, with a brief overview of what that area of law covers.

Tax Law

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

Peter Gabor Haller is one of 85,302 tax attorneys indexed nationally. Browse tax attorneys in District of Columbia →

Government & Administrative Law

Attorneys for administrative law, agency hearings, government contracts, licensing, and public benefits.

Peter Gabor Haller is one of 132,225 government attorneys indexed nationally. Browse government 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 Peter Gabor Haller

Where is Peter Gabor Haller's law office located?
Peter Gabor Haller's law practice is located in Washington, District of Columbia. The firm is Stone Mattheis Xenopoulos And Brew Pc. You can contact the office directly through this profile page.
What practice areas does Peter Gabor Haller handle?
Peter Gabor Haller focuses on tax, government. Each practice area listed reflects experience handling cases of that type in District of Columbia.
How long has Peter Gabor Haller practiced law?
Peter Gabor Haller has 25+ years of legal experience and has been licensed since 2001.
Where did Peter Gabor Haller go to law school?
Peter Gabor Haller earned their education at (J.D., 2000); (B.S., 1995).
How can I contact Peter Gabor Haller for a consultation?
You can contact Peter Gabor Haller 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.

Practice Areas

Education

J.D.
George Washington University Law School
- 2000
B.S.
Carnegie Mellon University
- 1995

Bar Admissions

New York
Admitted: 2001
District of Columbia
Admitted: 2008

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