Mr. Campbell is a founding Member and Principal of APX Energy, LLC. Mr. Campbell is a 4th generation oil producer. He is also co-founder of a number of independent oil and gas operating companies, which include Campbell Energy, LLC, Campbell Enterprises of Illinois, LLC, Camata Energy, LLC and Texaco, LLC. All of the aforementioned entities are Illinois limited liability companies with the exception of Camata Energy, LLC, which is a Delaware limited liability company. Campbell Energy is one of the largest oil producers in the Illinois Basin while Campbell Enterprises of Illinois is one of the largest well service companies in the Illinois Basin. Mr. Campbell and his affiliates have serviced over 1,000 wells in the Illinois Basin. In addition, he also sits on the Board of Directors for the Illinois Oil and Gas Association.