Dorothy Thompson, who served as CEO of the Drax Group international power and energy trading company, has been appointed independent non-executive director and chair designate for Tullow Oil, according to a news release.

The director appointment takes effect at the end of Tullow’s annual general meeting April 25.

Thompson will succeed Aidan Heavey, Tullow’s current chairman and founder, as chair at the end of the company’s July 20 board meeting. Heavey is retiring from the board.

As stated in the news release, Thompson served 12 years as CEO of Drax Group until year-end 2017. Before joining Drax, she managed InterGen’s European power business, was head of project finance at PowerGen and worked at CDC Capital Partners. She holds a bachelor of science and a master’s of science in economics from the London School of Economics and Political Science.