Atty. Katherine Long Mathieu

Atty. Katherine Long Mathieu

Katherine Long Mathieu is a lawyer practicing taxation. Katherine has been licensed for 12 years.

Washington Washington 12 yrs experience 12 year
Call (443) 909-4791 Book Appointment

Profile Summary

About Katherine Long Mathieu at a glance

Katherine Long Mathieu is an Attorney based in Washington, District of Columbia, practicing at Skadden Arps Slate Meagher And Flom Llp. They have 12+ years of legal experience, licensed to practice since 2014. Their practice focuses on tax. Admitted to practice in Texas (2014) and District of Columbia (2015). Educated at University Of Chicago (J.D., 2014). Serands clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Katherine Long Mathieu is a lawyer practicing taxation
  • Katherine has been licensed for 12 years
  • Katherine practices at Skadden, Arps, Slate, Meagher & Flom LLP in Washington, DC

Practice Areas Explained

Katherine Long Mathieu's Areas of Practice

Each practice area below reflects the types of cases Katherine Long Mathieu 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.

Katherine Long Mathieu is one of 85,302 tax attorneys indexed nationally. Browse 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 Katherine Long Mathieu

Where is Katherine Long Mathieu's law office located?
Katherine Long Mathieu's law practice is located in Washington, District of Columbia. The firm is Skadden Arps Slate Meagher And Flom Llp. You can contact the office directly through this profile page.
What practice areas does Katherine Long Mathieu handle?
Katherine Long Mathieu focuses on tax. Each practice area listed reflects experience handling cases of that type in District of Columbia.
How long has Katherine Long Mathieu practiced law?
Katherine Long Mathieu has 12+ years of legal experience and has been licensed since 2014.
Where did Katherine Long Mathieu go to law school?
Katherine Long Mathieu earned their education at (J.D., 2014).
How can I contact Katherine Long Mathieu for a consultation?
You can contact Katherine Long Mathieu 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.
University Of Chicago
- 2014

Bar Admissions

Texas
Admitted: 2014
District of Columbia
Admitted: 2015

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