Atty. Mark Austin Haddox

Atty. Mark Austin Haddox

Mark Austin Haddox is a lawyer. Mark received a degree from American University Washington College of Law, and has been licensed for 9 years.

Washington Washington 9 yrs experience 9 year
Call (771) 218-3541 Book Appointment

Profile Summary

About Mark Austin Haddox at a glance

Mark Austin Haddox is an Attorney based in Washington, District of Columbia, practicing at Simpson Thacher And Bartlett Llp. They have 9+ years of legal experience, licensed to practice since 2017. Admitted to practice in New York (2017) and District of Columbia (2018). Educated at American University Washington College of Law (—). Serands clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mark Austin Haddox is a lawyer
  • Mark received a degree from American University Washington College of Law, and has been licensed for 9 years
  • Mark practices at Simpson Thacher & Bartlett LLP in Washington, DC

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 Mark Austin Haddox

Where is Mark Austin Haddox's law office located?
Mark Austin Haddox's law practice is located in Washington, District of Columbia. The firm is Simpson Thacher And Bartlett Llp. You can contact the office directly through this profile page.
How long has Mark Austin Haddox practiced law?
Mark Austin Haddox has 9+ years of legal experience and has been licensed since 2017.
Where did Mark Austin Haddox go to law school?
Mark Austin Haddox earned their education at (—).
How can I contact Mark Austin Haddox for a consultation?
You can contact Mark Austin Haddox 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.

Education

American University Washington College of Law
- In Progress

Bar Admissions

New York
Admitted: 2017
District of Columbia
Admitted: 2018

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