Gary Rosenthal is a native of Tulsa, Oklahoma, and an honors graduate of Harvard College (A.B., magna cum laude) and Harvard Law School (J.D.). He was the Charles Henry Fiske Scholar at Trinity College, Cambridge University. After law school, he clerked for the Hon. Irving Goldberg of the U.S. Fifth Circuit Court of Appeals and practiced as a partner at Vinson & Elkins in Houston prior to 1987. He then served as President of Heaney Rosenthal, Inc., a closely held investment firm. Rosenthal joined The Sterling Group in 1987 as part of the senior management team at Cain Chemical, a Sterling investment. He later became a partner and took on various operating roles, including Executive Chairman of HydroChem; CEO of AXIA, Inc. (1998-2001); Chairman & CEO of Wheatley TXT Corp. (1991-1994); Executive Chairman of Diamond Products International; President & Co-CEO of Highline Aftermarket Holdings LLC; Chairman of Safe Fleet Investments LLC (2013-2018), Safe Fleet Holdings LLC, Safe Fleet Acquisition Corp., and Highline Aftermarket LLC; and Non-Executive Chairman of Hydrochem Holdings, Inc. (2003-2004). He rejoined Sterling as a partner in 2005 and is currently an Advisory Partner. Rosenthal has held numerous corporate board positions, including Lead Independent Director of Cactus, Inc. (2023-present, Director since 2017); Director of Cactus Wellhead LLC (2018-present); Independent Director of Oil States International, Inc. (2011-2018); Director of Jackson Products, Inc. (2001-2013); Director of Pioneer Companies, Inc.; and various director/chair roles at Highline Aftermarket Investments LLC, Sterling Polychem Investments LLC, Hudson Products Corp., and others. In philanthropy, he serves as Vice Chairman of The Tikvah Fund board of trustees and Chairman of Texas Children’s Hospital, University of Houston System, and Gordon and Mary Cain Pediatric Neurology Research Foundation. He is also a board member of Commentary Inc., University of St. Thomas (Houston), Albert B. Sabin Vaccine Institute, Finance Committee of the Texas Medical Center, and Sabin Foundation.