06/19/2026
👏 The U.S.-Ukraine Business Council (USUBC) is pleased to welcome Laura K. Cooper, Adjunct Professor at Georgetown University and former Deputy Assistant Secretary of Defense; Lieutenant General (Ret.) John Jansen, Independent Board Director of Oklo; and Major General (Ret.) Borys Kremenetskyi, former Defense Attaché at the Embassy of Ukraine to the United States, as Senior Advisors on Defense and Security. Each brings exceptional depth of experience across defense, national security, transatlantic policy, and U.S.-Ukraine relations, and USUBC is proud to count them among its advisory community.
Laura K. Cooper served as Deputy Assistant Secretary of Defense for Russia, Ukraine, and Eurasia from 2017 to 2025, where she led the Department of Defense's response to Russia's 2022 invasion, built and directed the cross-agency response, and established and chaired the 50-nation Ukraine Defense Contact Group, which she leveraged to secure an additional $60 billion in international donations for Ukraine's defense. A career member of the Senior Executive Service, she also strengthened U.S. defense relationships across the Caucasus, Central Asia, Moldova, and the Western Balkans, served on the faculty of the National War College, and earlier held roles at the State Department and the Carnegie Endowment for International Peace. Her service has been recognized with the Presidential Rank Award of Distinguished Executive, the Samuel J. Heyman Service to America Medal, and the Order of Princess Olha, presented by President Zelenskyy. She currently serves as an Adjunct Professor at Georgetown University.
Lieutenant General (Ret.) John Jansen is a retired U.S. Marine General Officer who served from 1987 to 2021, retiring at the three-star rank. His senior military roles included Deputy Commandant for Programs and Resources (the Marine Corps' chief financial officer), Commandant of the Eisenhower School at National Defense University, and Commanding General of the 3rd Marine Expeditionary Brigade. A decorated naval aviator and TOPGUN graduate, he also served as an arms control treaty inspection team chief, conducting inspections in Russia, Ukraine, and Belarus. Since retirement, he has held senior industry roles including Managing Director of the EMEA business unit for Luminator Technology Group, a Blackstone portfolio company, and CEO of Advanced Technology International, and currently serves on the board of Oklo, an advanced nuclear energy company.
Major General (Ret.) Borys Kremenetskyi brings four decades of service in Ukraine's armed forces, spanning military aviation, NATO integration, peacekeeping, and diplomatic representation. He served as a Military Observer with the UN Mission to Tajikistan and Afghanistan, Deputy Branch Chief at NATO's International Military Staff, and Director of the Euro-Atlantic Integration Department of the Armed Forces of Ukraine. Following Russia's invasion of Ukraine's east, he led the Ukrainian side of the Joint Ceasefire Coordination and Control Centre, and later served as Defence and Air Attaché at the Embassy of Ukraine to the United Kingdom. From March 2020 to March 2026, he served as Defence Attaché at the Embassy of Ukraine to the United States.
USUBC and our members are delighted to welcome this illustrious group as Senior Advisors, and look forward to benefiting from their outstanding expertise in support of U.S.-Ukraine defense and security cooperation.

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