“The increase and upgrading to our management team this past year have been of significant benefit which led to the completion of our commercial design, our statement of feasibility by DNV-GL, and the progress in finalising planning and permitting,” Allaun said in a statement.
“It’s become clear more recently that we require a seasoned commercial and professional manager at the helm of the company.”
David Ryan, presently technical director at PowerHouse, will become acting chief executive.
Chairman Cameron Davies, meanwhile, added: “Keith has stewarded PowerHouse through challenging and changing times over his tenure on the board and leading the management team; he has been responsible for considerable achievements for which we are very grateful.
“We wish him every success in his future challenges and we respect his privacy at this time.”