In November 2012, Transit Systems was awarded a contract by Transport for NSW to operate region 3 bus services in Western Sydney, taking over services operated by Busabout, Hopkinsons, Metro-link and Westbus.

Transit Systems also took over route T80 on the Liverpool–Parramatta T-way from Western Sydney Buses.

On 1 July 2018, Transit Systems took over the operation of region 6 from State Transit on an eight-year contract operating services in the Canterbury-Bankstown, Eastern Suburbs, Inner West, North Shore and St George regions.

As of January 2025, Transit Systems NSW operates a fleet of 1244 buses[10] with 119 of them being electric.

[12] Media related to Transit Systems Sydney at Wikimedia Commons