President of Pecten (Shell) International for 30 years; retired in 1987. President of Arco International for 7 years. Founded Roxanna Oil; currently Chairman; consultant to many oil companies. Early exploration and development of many shale gas plays: Barnett (2005 led development of the western extension), Marcellus (2007, when only 3 wells had produced), Floyd/Neal Shale, Eagle Ford, Meade Peak, Chainman (2006), Woodford (2009), New Albany (2012). Former President of the AAPG (American Association of Petroleum Geologists, the largest geologic society in the world). Honored by the AAPG as “A Living Legend in the Oil and Gas Business,” served as AAPG Distinguished Lecturer, Exxon Distinguished Lecturer to Australia, and Huffington Distinguished Lecturer for Southeast Asia. Organized and chaired 2000 Presidential Energy Policy Symposium in Washington, DC. R H Dott award for Best Geological Publication (2002). Hedberg Medal (2003) for distinguished international scientific service. Honored as a “Legendary Oil Finder” by the Petroleum History Foundation. Sydney Powers Medal (2009) for outstanding scientific achievements. Serves in numerous professional and charitable groups; honored by four universities. Bartell Professor of Geoscience at the University of Oklahoma, and Chief Scientist at the Sarkeys Energy Center. Fellow of the American Association for the Advancement of Science, the Institute for Study of Earth and Man at Southern Methodist University, and the Geological Society of the United Kingdom. Knighted by the President of Cameroon, 1987.