Don Clarke is a consulting Petroleum geologist who lives and works in southern California. He retired from his civil service work with the City of Long Beach (Unit Operator for the Giant Wilmington oil field) and the California State Lands Commission in 2004. His clients include Occidental Petroleum, California Resources Corporation, the Cities of Beverly Hills, Newport Beach and Hermosa Beach, Mid Con Energy, Emerald Energy, Geomechanics Technologies, Glamour Magazine and others. Don served on two 0committees for the National Research Council and was on the Board of Directors for the National PTTC and the Dibblee Foundation. Don has been active in the AAPG and has served the association in many ways and received many awards. Don has had a lifelong interest in astronomy and paleontology.