Ariel Lavinbuk is the Managing Partner of our Washington, DC office; in this role he oversees the office growth strategy as part of the US expansion following the combination to HSF Kramer. Ariel is a seasoned litigator with nearly two decades of experience taking complex commercial cases to resolution in federal and state trial courts nationwide, in bankruptcy courts, and in nearly every federal court of appeals.
A significant portion of Ariel’s work is devoted to complex commercial and investment-related disputes involving loans and bonds, fraudulent transfers and preferences, the fiduciary duties of officers and directors, breach of contract, commercial fraud, and civil RICO. He is a leader of the firm’s Special Situations and Private Credit practices and regularly works with his colleagues in corporate, finance, and restructuring to advise clients on litigation risks in new investments and liability-management transactions.
Ariel regularly handles complex, sensitive cross-border matters — particularly in the investment and restructuring contexts. He often litigates international disputes (including against foreign sovereigns) in U.S. courts, frequently works with and coordinates foreign counsel prosecuting actions abroad, and has provided expert testimony on U.S. law in foreign judicial proceedings. He has also represented foreign and U.S. elected officials and their staff as well as senior executive branch officials in civil and criminal actions and congressional investigations.
For additional information on Ariel’s professional background, please visit: https://www.hsfkramer.com/our-people/a/ariel-n-lavinbuk
Updated Oct 2025
