Madalena Energy is on the search for a new chief executive following the departure of its current boss.
Kevin Shaw will step down from his role while a search begins for a new appointment.
Steven Sharpe, chairman of the company’s board, has been appointed Interim president and chief executive in the meantime.
The move comes on the same day the chief executive of Norwest Energy also announced his resignation.
Peter Munachen had led the company since 2008.