Mark is President of Leonard Exploration, works with the SEG Foundation and has been a Director of TGS since 2009. He retired from Shell in 2007 after serving in various roles including Director New Business Development Russian and CIS, Director Shell Deepwater Services, Director Shell EP International Ventures, Prospect Development Manager for Deepwater GoM and Chief Geophysicist for GoM. He graduated from Indiana University, BS Astrophysics, MA Geology.