Norwest Energy said its chief executive has resigned from his role.
Peter Munachen will also step down as executive director of the company from the end of this month.
He had been appointed as head of the company in 2008 with considerable experience in the resource sector.
John Annand will be acting cheif executive until a permanent appointment is made for a new chief executive.
A separate announcement is expected to be made regarding the appointment of a replacement director to the board of Norwest Energy.
Munachen said:”Signing a $15 million deal with the major Indian Government company, Bharat Petroleum, is one of the most memorable and significant achievements. It enabled Norwest to drill Arrowsmith-2 and thus pioneer the exploration for shale gas in the northern Perth Basin.
“I am indebted to my fine team for their loyalty, hard work, dedication and professionalism. I know they are well placed to build on these foundations and continue Norwest Energy’s progress, and I wish them every success.”