Engineering firm Transfield Services has won $100 million in new work with resources companies in Western Australia’s Pilbara region.

Transfield said on Monday it had signed a one-year contract worth $65 million with Rio Tinto to design and construct a fuel storage terminal in Dampier.

The company was also awarded a $35 million, one-year contract to design and build a diesel storage facility at Fortescue Metals Group’s Solomon mine project.