Follow the money in the Koch wiki.
Prior to assuming his role at Fueling U.S. Forward, Drevna was a Distinguished Senior Fellow at the Institute for Energy Research and a board member of the American Fuel & Petrochemical Manufacturers. In 2007 he was the president of the American Fuel & Petrochemical Manufacturers, the national trade association representing 98 percent of oil refining capacity in the U.S., formerly known as the National Petrochemical & Refiners Association.
Charles Drevna is a longtime veteran of the fossil fuel lobby, with more than four decades of experience working for oil, gas, and coal companies, and for the national associations that represent them.