On 29 September 1996, Transport Management Group Pty Limited (TMG), trading as Southern Coast Transit, commenced operating services in the Rockingham area from depots in Mandurah and Rockingham with 57 Mercedes-Benz and Renault buses.

[5] In August 1997, two Denning double decker coaches were acquired from AAT Kings and Australian Pacific Touring to operate a Mandurah to Perth service.

[6][7] On 5 July 1998, Southern Coast was awarded the contract to operate Cockburn, Fremantle and the Perth CAT services, also awarded Belmont and Claremont area services as CGEA Group.

[22] In July 2022, new bus contracts for Fremantle and Rockingham were awarded to Transdev for another 10 years, starting on 2 October 2022.

[23] Transdev WA operate five depots in East Perth, Mandurah, O'Connor (Fremantle), Rockingham and Pinjarra.