GREEN Rock Energy has appointed Alan Knights and Scott Sherwood Spencer as executive director and non-executive director respectively in the WA-based geothermal energy company. Mr Knights is currently non-executive director of Green Rock Energy and chief financial officer of Perilya Limited. He was appointed to the position of executive director on November 21, relinquishing his position at Perilya Limited. He has more than 30 years’ experience in finance and mining industries. Mr Spencer, a director of ASX/AIM-listed Hardman Resources, will join the board on November 29.