Tremain resigned from his role of executive director of Emerald Resources, where he has worked since Emerald acquired Renaissance, but will remain on the board.
He replaces outgoing boss David Frances, who will remain as an advisor to Novo.
Dr Andrew Tunks has been appointed as MD of Meteoric Resources, weeks after resigning from the top job at Auroch Minerals.
Current Meteoric executive director Graeme Clatworthy will become a non-executive director.
Peel Mining has appointed geologist and mining executive Ian Bamborough as managing director of upcoming gold spinout Saturn Metals.
Bamborough, recently of Liontown and Spectrum Rare Earths, will be joined at Saturn by non-exec appointee Andrew Venn, who is currently commercial manager of drilling contractor DDH1.
Terramin Australia has reorganised its corporate structure to focus on the permitting phase of the Tala Hamza zinc project in Algeria.
Current CEO Martin Janes will transition to an executive corporate role to oversee the company’s finance functions and Australian projects.
Bruce Sheng will assume the role of executive chairman to lead the permitting process. Existing non-executive director Xinyu Wang will become an executive director.
Lion Selection African fund manager Tim Markwell has been appointed as acting CEO of Celamin Holdings.
Lorry Hughes has resigned as executive director of Intermin Resources to take up a role with a new explorer.
The company has promoted its general manager, mining Grant Haywood to chief operating officer.
Rod Lovelady has been appointed as chief financial officer of Red River Resources, replacing Cameron Bodley, who remains company secretary.
Lepidico has appointed resources advisor Cynthia Thomas as an independent non-executive director, and Mt Cattlin general manager Brian Talbot as a non-executive director and representative of major shareholder Galaxy Resources.
Near-term US lithium producer Piedmont Lithium has made senior management appointments.
Patrick Brindle has been appointed as vice president, project management, David Buckley is VP, chief process engineer, and Bruce Czachor is VP, general counsel.