The CDC NSW brand began to appear in early 2017 as an umbrella branding of ComfortDelGro Australia's operations in New South Wales, which at the time consisted of Hillsbus, Blue Mountains Transit, Hunter Valley Buses, QCity Transit, Transborder Express and Charterplus.

[7] In March 2022, ComfortDelGro Australia announced it intended to rebrand all of its operations in New South Wales under the CDC NSW brand.

[20] As of January 2025, CDC NSW in Sydney (excluding CDC Charter's St Mary's depot) operates 767 buses (including 2 electric buses) across seven depots:[1][21] Outside of Sydney, CDC NSW also operates scheduled route, school bus and coach services in Northern NSW out of depots in Ballina and Billinudgel.

Its service areas include Ballina, Lennox Head, Byron Bay and Mullumbimby.

Since 2008, Hunter Valley Buses' services have formed Outer Sydney Metropolitan Bus Regions 2 and 4.

[22] In August 2018, its service area expanded to include Outer Sydney Metropolitan Bus Region 11 after the purchase of Coastal Liner.

[21] In August 2014, CDC purchased Blue Mountains Bus Company with 101 buses.

[27] Founded in 1951 as Pearce Omnibus, it operated services in the lower Blue Mountains.

[28] In September 2012, CDC purchased Deane's Transit Group which comprised Deane's Buslines which operates local services in Queanbeyan and into Canberra, and Transborder Express which runs services between Yass, Murrumbateman, Hall and Canberra.

In January 2023, Qcity Transit and Transborder Express were rebranded as CDC Canberra.

Effective from the start of the contract, CDC NSW acquired Red Bus Service and gained full ownership of the operation.

[18] While CDC NSW was only established in 2017, Westbus and Hillsbus were two of the first three New South Wales bus companies to be acquired by ComfortDelgro Cabcharge in 2005.

[36][37][38] As a result, Westbus ceased to operate routes, with remaining bus fleet transferred to other ComfortDelGro Cabcharge subsidiaries.

Blanch's Bus Company, established in 1976, operated scheduled route and school bus services in the Ballina, Lennox Head, Byron Bay and Mullumbimby areas of Northern NSW out of depots in Ballina and Billinudgel.

[42] Blanch's Bus Company and Brunswick Valley Coaches were acquired by ComfortDelGro in April 2019.