Mr. O’Brien is an investor and Strategic Advisor to Extraction Oil & Gas. From 2003 until 2010, he served as CEO of American Oil & Gas, which was acquired by Hess Corporation. Mr. O'Brien co-founded Tower Colombia Corporation in 1995 and served as its CEO and President. He co-founded Tower Energy in 1984 and Tower Drilling Company in 1980. In 1980, he joined Montana Power Company as Senior Petroleum Engineer with the responsibility for design, long-range planning and performance economics for its exploration and development programs. He joined the Colorado Interstate Gas Company in 1974, where he was responsible for the design, acquisition and development of company-owned gas storage fields. Mr. O’Brien began his career in the oil and gas industry with the Dowell Division of Dow Chemical Company, where he engineered and supervised all phases of well stimulation and cementing. He has over 30 years of experience working the DJ Basin and the Powder River Basin. Mr. O'Brien received his BS in Petroleum Engineering from the Montana Tech.