David D. Halbert, M.D. Founded Caris, Ltd. in 2005 and serves as its General Partner. Dr. Halbert serves as the Chairman and Chief Executive Officer at Caris Life Sciences, Inc., and a General Partner to Caris group of companies. Dr. Halbert founded Caris Life Sciences, in 1987. Dr. Halbert has more than 35 years of management experience in the energy, financial and health care industries. He served as Chairman and Chief Executive Officer of Miraca Life Sciences, Inc. (formerly Caris Diagnostics, Inc.). Prior to this, he served as the Chairman of the Board and Chief Executive Officer of CaremarkPCS, LLC (also known as AdvancePCS) since 1986 and served as its President since March 27, 2003.