David Alan Pursell holds the position of Managing Director & Head of Securities at Tudor, Pickering, Holt & Co. Securities, Inc.

He is also Executive VP-Planning & Energy Fundamentals at Apache Corp. and Executive Vice President-Development at APA Corp.

In the past Mr. Pursell occupied the position of Principal at Arco Alaska, Inc., Manager for S.A. Holditch & Associates, Inc., Managing Director & Head-Securities at Tudor, Pickering, Holt & Co. LLC, Director-Upstream Research at Simmons & Company International, Research Principal at Pickering Energy Partners, Inc. and Chairman at Independent Petroleum Association of America.

Mr. Pursell received a graduate degree and an undergraduate degree from Texas A&M University.