Mr Richardson has served as executive vice president and COO of Energen Resources for the past two years. He will succeed James McManus II, who is now Energen’s chairman and CEO.

Mr Richardson has joined Energen Resources in 1985 and served in various engineering capacities before being named as vice president of acquisitions and engineering in 1997. Prior to joining Energen Resources, he worked with Shell Oil, AmSouth Bank and Jim Walter Resources.

Mr McManus said: John has been a key player in Energen Resources’s growth from a small, niche player in coalbed methane development in Alabama to one of the top 20 independent oil and gas producers in the US.

As the head of our acquisitions program, John has been instrumental to our success. His broad-based oil and gas background and his 22-year knowledge of Energen Resources will serve him well as he oversees the day-to-day operations of our growing oil and gas exploration and production business.