Stalker is a well regarded mining executive who among his previous roles was chief executive of Uramin Inc which was sold for US$2.5bn to Areva in August 2017.
"We are pleased to see such a high calibre appointment at Helium One and think this reflects the high level of potential associated with this exciting growth company,” said Alastair Ferguson, Solo executive chairman.
“Through our board representation on Helium One, with Tom Reynolds acting as a non-executive director, we will continue to maintain close dialogue with Ian and his team, and offer our technical and commercial counsel as required, as we seek to enhance the value of our investment in the company."
Helium One chairman Neil Herbert, meanwhile, added: “Ian has a lifetime of experience of taking projects from exploration to production and will lead the company as it advances towards drilling our prospects in Tanzania.
“Ian and I have worked together in the past, notably as managing director and finance director of UraMin Inc which was sold for US$2.5 billion, and we are delighted to be working as a team again.”