Mastermyne has won a contract for BHP Billiton subsidiary Illawarra Coal's operations.
The $15 million contract will see Mastermyne provide secondary support and outbye services for the West Cliff coal mine.
The contract is a continuation of the existing contracts in place.
This latest agreement beings this month and will run for two years.
Commenting on the renewal, Mastermyne CEO Tony Caruso said "we are very pleased to have rolled over the scope of the existing contract for a further two years".