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Declan Tansey

Declan Tansey

Senior Associate

Declan Tansey's practice focuses on helping international nongovernmental organizations, private foundations, public charities, trade associations, advocacy organizations, and other tax-exempt organizations in strategic planning and decision-making, including relating to taxation and compliance with government regulation. He has provided legal advice to leading nonprofit foundations and has helped clients seek and receive federal grants. His work encompasses a broad range of operational, regulatory, and transactional matters, including qualification and compliance with grant programs, business activities, lobbying and political activities, and other requirements for tax-exempt organizations. He also represents clients with strategic and legal advice on charitable, advocacy-related, and political giving.

Mr. Tansey received his JD from the University of Virginia School of Law, where he was the executive editor of the Virginia Law Review.


Best Lawyers
"Ones to Watch" — Tax Law (NY) (2024)
The Legal 500 US
US Taxes: Not-for-Profit (Nonprofit and Tax-Exempt Organizations) (2021)



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


  • New York
  • District of Columbia
  • Virginia