Thomas Ewing has a B.A in Geology from Colorado College, an M.S. in Geochemistry from New Mexico Institute of Mining and Technology, and a Ph.D. in Geological Sciences from the University of British Columbia. He has held numerous notable offices including President of AAPG Division of Professional Affairs (2007-2008), President of AAPG Energy Minerals Divisions (1999–2000), Chairman of Publications Committee AAPG Energy Minerals Division (2000-2002), and President of South Texas Geological Society (1990-1991), and General Chairman of 1996 GCAGS Convention (1993-1996).