Molly O'Casey is a trade attorney in Holland & Knight's Washington, D.C., office. Ms. O'Casey focuses her practice on a broad range of transactional, litigation and regulatory compliance matters in the areas of U.S. customs laws, export controls, economic sanctions and embargoes, national security reviews and maritime.

Ms. O'Casey advises clients on a wide variety of import matters before the U.S. Customs and Border Protection (CBP), including seizures, classification, valuation and country of origin, as well as preferential duty treatment under the Generalized System of Preferences (GSP) and free trade agreements (FTAs).

In addition, Ms. O'Casey counsels clients on U.S. export controls laws, such as the International Traffic in Arms Regulations (ITAR) and the Export Administration Regulations (EAR), especially in the context of mergers and acquisitions (M&A). She has extensive experience with U.S. trade embargoes and economic sanctions administered by the U.S. Department of the Treasury's Office of Foreign Assets Control (OFAC) and the U.S. Department of State.

Also, Ms. O'Casey has experience in maritime litigation in matters before the Federal Maritime Commission, as well as in federal district and appellate courts, involving federal maritime law and U.S. Shipping Act matters.

Ms. O'Casey is actively involved in Holland & Knight's pro bono activities, through which she provides counseling to individuals on immigration matters.

Prior to Holland & Knight, Ms. O'Casey clerked at the U.S. Court of International Trade. Her previous experience also includes work at a boutique law firm and an international consulting firm, with an emphasis on customs issues and trade remedies. During law school, Ms. O'Casey was an associate editor for the Cornell International Law Journal.

Not yet admitted to District of Columbia Bar; admitted to New York Bar only and practicing under supervision of lawyers licensed to practice in District of Columbia.


  • Cornell Law School, LL.M.
  • Université Paris 2 Panthéon-Assas, Master 1, International Private Law
  • Université Paris 2 Panthéon-Assas, License, French Law
  • University College Dublin, B.C.L., Irish Law, 2:1 honors
Bar Admissions/Licenses
  • New York
  • Washington Foreign Law Society, Board of Governors, 2024
  • American Bar Association, International Law Section, International Trade Committee, 2019-2022
Honors & Awards
  • 100 Women in Trade, Treasury & Payments, Trade Finance Global, 2023
  • Rudolf B. Schlesinger Fellow, Cornell Law School, 2017-2018
Spoken Languages
  • French
  • Spanish


Speaking Engagements