ASP Defence Support Services began in 2002 as the Western Australia office of ASP Ship Management, located in Rockingham. ASP managed the Royal Australian Navy's auxiliary oiler, HMAS WESTRALIA, before tendering for and winning the In-Service Support Contract for her replacement, HMAS SIRIUS.

ASP Defence Support Services brings a wealth of commercial engineering management experience and combines it with a deep understanding of the requirements of Defence, with a very strong
safety focus.