Clark has extensive industry experience, having started her career as a geologist with Western Mining Corporation before holding senior positions at BHP Billiton in technology and health, safety and environment.

She has also advised the Australian government and the World Economic Forum on issues relating to science technology, innovation and research, and was this year appointed a Companion of the Order of Australia for her services to scientific research and development.

Rio chairman Jan du Plessis said Clark was a good fit for the company.

“We are very pleased that Megan has accepted our invitation to join the Rio Tinto board,” he said.

“Megan not only has extensive mining experience, but is highly regarded and has, throughout her career, forged a strong reputation for driving a culture of innovation and technology, making her a great fit for Rio Tinto. Her appointment further reinforces the significance of Australia to Rio Tinto’s global operations.”

Clark said she was looking forward to getting started in the new role.

“Over many years I have come to know Rio Tinto very well, and it’s a great global company with an exciting strategic outlook,” she said.

“I am delighted to join the Rio Tinto board and look forward to working with the board and management team as Rio positions its business for the future.”

Clark was due to leave CSIRO in December, but has stood down from her current position with immediate effect.