New Fortescue board member Larry Marshall says he is convinced the company will achieve the goal of decarbonising its mining operations by 2030 as it seeks to become a major supplier of prototype technology and machinery beyond the resources sector.

The former CSIRO boss said he had no regrets about joining the board of the miner despite his appointment coinciding with a leadership upheaval sparked by the departure of chief executive Fiona Hick in August after just six months in the top job.