The work includes management, fleet maintenance and operational services for mining at the project.
US coal miner Peabody Energy extended its contract for work at Moorvale Mine from June 2012 to September 2013.
Leighton Mining general manager Greg Fokes said the contract extension was strong evidence to the enduring, successful and collaborative partnership between Leighton Mining and Macarthur Coal.
"We look forward to working with Peabody Energy to further improve productivity at Moorvale Mine," Fokes said.
