Atty. Declan Thomas Tansey

Atty. Declan Thomas Tansey

Declan Thomas Tansey is a lawyer practicing tax-exempt organizations, tax, corporate governance and 1 other area of law. Declan received a B.A. degree from University of Virginia in 2010, and has been licensed for 10 years.

Washington Washington 10 yrs experience 10 year
Call (771) 333-2417 Book Appointment

Profile Summary

About Declan Thomas Tansey at a glance

Declan Thomas Tansey is an Associate based in Washington, District of Columbia, practicing at Arnold And Porter Llp. They have 10+ years of legal experience, licensed to practice since 2016. Their practice focuses on business and tax. Admitted to practice in District of Columbia Virginia (2016). Educated at University of Virginia School of Law (J.D., 2015) and University of Virginia (B.A., 2010). Serands clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Declan Thomas Tansey is a lawyer practicing tax-exempt organizations, tax, corporate governance and 1 other area of law
  • Declan received a B.A. degree from University of Virginia in 2010, and has been licensed for 10 years
  • Declan practices at Arnold & Porter LLP in Washington, DC

Practice Areas Explained

Declan Thomas Tansey's Areas of Practice

Each practice area below reflects the types of cases Declan Thomas Tansey 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.

Declan Thomas Tansey 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.

Declan Thomas Tansey 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 Declan Thomas Tansey

Where is Declan Thomas Tansey's law office located?
Declan Thomas Tansey's law practice is located in Washington, District of Columbia. The firm is Arnold And Porter Llp. You can contact the office directly through this profile page.
What practice areas does Declan Thomas Tansey handle?
Declan Thomas Tansey focuses on business, tax. Each practice area listed reflects experience handling cases of that type in District of Columbia.
How long has Declan Thomas Tansey practiced law?
Declan Thomas Tansey has 10+ years of legal experience and has been licensed since 2016.
Where did Declan Thomas Tansey go to law school?
Declan Thomas Tansey earned their education at (J.D., 2015); (B.A., 2010).
How can I contact Declan Thomas Tansey for a consultation?
You can contact Declan Thomas Tansey 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

J.D.
University of Virginia School of Law
- 2015
B.A.
University of Virginia
- 2010

Bar Admissions

District of Columbia Virginia
Admitted: 2016

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