Henry W. Posamentier is currently a Sr. Consultant Geologist with Chevron Energy Technology Company in Houston, TX. Before joining Chevron, he was Chief Geologist and Distinguished Advisor for Anadarko in The Woodlands, Texas after working several years in their Calgary office. He has previously worked for ARCO in the U.S. and Indonesia, Esso Resources in Canada, and Exxon Production Research Co. His principal expertise is in siliciclastic sequence stratigraphy and depositional systems and he has published widely on these topics. He received his M.A. and Ph.D. in Geology from Syracuse University. In 1971-72, Dr. Posamentier was a Fulbright Fellow to Austria. He has served as a North American AAPG Distinguished Lecturer, as well as several tours as an AAPG International Distinguished Lecturer. Recently (2008), he was awarded the Pettijohn Medal for excellence in sedimentology from the Society for Sedimentary geology (SEPM), and the William Smith Medal (2010) for contributions to applied and economic aspects of geology from the Geological Society of London.