The Mount Victoria Area remodelling project is a $79 million contract to adjust the track and overhead wires to allow more trains to travel to the Blue Mountains.
Work starts this month and will also include the upgrading of the existing mechanical signalling system to electronic signalling.
John Holland Executive General Manager Rail Steve Butcher said the rail team was looking forward to making train trips more reliable.
“In rail, we know that the work we do makes a huge difference to how people get to work, how they get home and where they choose to live,” Mr Butcher said.
“We take work like this very seriously, because we know it has the capacity to improve lives.”
The majority of remodelling work on the Mount Victoria project will be carried out by John Holland’s Rail Services team, based in Seven Hills, but the project team will look to local subcontractors for associated civil and station works.
The works include slewing of track, remodelling of stabling yard tracks, overhead wiring renewals and upgrading signalling to modern remote-controlled systems.
Mount Victoria station has deep heritage significance to the local community, and recently celebrated its 150th anniversary.