Sylvia G. Costelloe
Sylvia’s practice focuses on advising clients on US sanctions programs, export control regulations, voluntary self-disclosures, internal investigations, and compliance with other US Department of Commerce and Department of Treasury regulations.
Sylvia also assists with international arbitration matters, including the representation of sovereign states, in numerous forms of arbitration.
Not admitted in California. Admitted in Maryland and the District of Columbia. Practicing under the supervision of firm principals.
Prior to joining Arent Fox, Sylvia served in a clerkship with Judge Kim R. Gibson (Western District of Pennsylvania).
Life Beyond the Law
Sylvia grew up in Europe and Asia, and is fluent in German and French. She enjoys hiking, skiing, reading, and traveling to Europe.