I spent 17 years as an oil and gas exploration geologist, working for major and independent oil companies of all sizes. I conducted regional geologic studies and generated prospects all over the western U.S. and conducted field work in Alaska. I was involved in the discovery and development of oil and gas fields in Colorado and Wyoming. My responsibilities included prospect generation and sales, submittal review, drilling supervision, sample and core examination, and reservoir evaluation. During this period, I developed particular expertise in the subsurface analysis of siliciclastic depositional systems in all environments from continental to marine.