Leighton Holdings Ltd has won a $1.15 billion contract to build Sydney's north west rail link in a joint venture with global conglomerate ACS Group's Dragados.
The New South Wales government contract included the construction of two 15km rail tunnels between Bella Vista and Epping, which will be the longest built in Australia, and the excavation of new underground stations for the link.
The TJHD venture is 75% owned by Leighton subsidiaries Thiess and John Holland, with Dragados holding the balance.
The win comes a day after Leighton Holdings was awarded a $1.3 billion deal for work at Fortescue Metals Group Ltd's Kings iron ore project at Solomon Hub, pushing the value of its contract for the Pilbara site to $2.8 billion in the contractor's largest ever single deal.
The $1.3 billion contract variation added to Leighton's existing commitments at the Firetail deposit at the Solomon Hub.
The $1.15bn NSW deal also includes civil works for five of eight new stations and two service facilities.
Leighton said contract completion was scheduled for the first quarter of 2017.