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Jack Senneff

Jack Senneff

Jack Senneff

Managing Director

Thompson Street Capital Partners


Jack serves as a Managing Director at Thompson Street Capital Partners, a St. Louis-based private equity firm focused on investing in founder-led middle market businesses in the Healthcare & Life Science Services, Software & Technology Services and Business Services & Engineered Products sectors. He leads the firm’s Deal Origination and Portfolio Support teams. Prior to joining Thompson Street, Jack served in the United States Army as an Infantry officer in Ranger, Airborne, and Mechanized units. He also subsequently managed a regional service sales force with Cintas Corporation, a national facilities service provider. Jack is a graduate of the United States Military Academy at West Point and earned his MBA from the Olin Business School at Washington University in St. Louis.