CPB Contractors is a 40 per cent joint venture partner delivering the $1.63 billion project. Sydney Metro West will provide a new underground rail connection between Parramatta and Sydney's CBD.

Works under the Eastern Tunnelling Package include 3.5 kilometres of metro tunnels between the future stations at The Bays and Hunter Street, as well as the excavation of caverns and shafts for the Pyrmont and Hunter Street stations.

CIMIC Group Executive Chairman Juan Santamaria said: “CIMIC is pleased to support social connectivity, economic growth and new opportunities across Greater Sydney through the delivery of this city-shaping transport project.”

CPB Contractors Managing Director Jason Spears said: “CPB Contractors has unmatched expertise in delivering major tunnelling projects across Sydney. We look forward to drawing on that experience to safely and successfully deliver this package while maximising training and employment opportunities for local communities.”

CPB Contractors' portfolio of major Sydney tunnelling projects includes the M6 (with CIMIC Group company UGL), WestConnex M4 East, M8 and Rozelle Interchange, as well as the Sydney Metro Western Sydney Airport Station Boxes and Tunnelling Works package.

Construction commenced in 2023 and is scheduled for completion in 2025.