Dwayne Purvis, SPE, is a petroleum engineering consultant, writer, speaker, and trainer based in Texas. He assists operators, investors, NGOs, and others in making thorough analyses and circumspect decisions, especially in hard-to-understand reservoirs and complex situations. With nearly 30 years of practice in multiple leadership roles and projects around the world, Purvis has studied scores of fields and advised clients of all sizes. He graduated from Texas A&M University and recently earned a master's degree in sustainable energy from Johns Hopkins University.