Don Clarke is a consulting petroleum geologist in Lakewood, California. Don got a BS degree in Geology from California State University, Northridge and did two years of graduate work at CSUN, LBSU and CSULA. He worked for the California State Lands Commission for 6 ½ years and the City of Long Beach, Department of Oil Properties (Unit Operator for the super giant Wilmington oil field) for 24 years. He taught geology at Compton Community College for 14 years and currently teaches petroleum geology at the University of Southern California. Currently Don does consulting work for clients that include Occidental Petroleum, Signal Hill Petroleum, City of Beverly Hills, City of Newport Beach, City of Hermosa Beach and Terralog Technologies. He has published over 60 papers and abstracts on topics that include computer mapping and Los Angeles basin geology. He has conducted many field trips and short courses for AAPG, PSAAPG, SPE and GSA. Don has appeared as a petroleum geology expert in the Swiss movie “A Crude Awakening”, the National Geographic series “Man Made” episode “Gallon of Gas”, the History Channel series “Trashopolis” episode 9 “Los Angeles” and VBSTV episode “Los Angeles” Hidden Wells”. Don has served AAPG as the Chairman of the House of Delegates, on the Advisory Council and on many committees. He is a past president of Pacific Section AAPG and has chaired and co-chaired conventions for PSAAPG, Cordilleran Section GSA and Western Region SPE.