OTOC has won the contract for work on the Roy Hill iron ore mine's processing plant.
The contract, which is valued at approximately $3 million, will see OTOC provide the mine process plant's civil works in-ground services for NRW.
NRW is a sub-contractor to Samsung C&T for the construction and earthworks at Roy Hill, and was awarded its contract early last year.
OTOC CEO Simon Thomas said the company is "pleased to be awarded this initial contract at Roy Hill. This contract provides OTOC with exposure to the development of this very large and globally significant iron ore project".
"We believe the quality of our work and on-the-ground presence at Roy Hill will result in significant opportunities to increase our services to NRW and expand the resources of services we can deliver to assist in the development of Roy Hill.