As the founder and President of Guard Hill House, LLC, a consultancy dedicated to clientele with global portfolio interests, Clarke brings over two decades of experience in diplomatic, intelligence, and military roles including service as U.S. Assistant Secretary of State. He and his team work to advance projects in support of security, stability, and prosperity. Clarke concurrently serves as the International Affairs Advisor for the Hellenic Group, LLC and heads their analysis cell to advise on conditions and risks related to the development of major industrial, commercial, and community infrastructure enclaves worldwide.