Throughout his career in Navy, Mirza commanded two submarines– the Daphné and Agosta 70.[1] Mirza also commanded the guided missile destroyer and a fleet of tankers as an officer in the Navy.[13] In 1990, he was posted at the Navy NHQ as a Naval Secretary, and held officer commanding assignments, first serving as the Flag Officer Commanding (FOC) of the 25th Destroyer Squadron as Commodore in 1993.[13] In 1994, he was promoted as Rear-Admiral and made Additional Secretary at the Ministry of Defence, working on various defence and procurement programmes.:1974[2] In 1994, he led series of complicated and lengthy negotiations, together with Prime Minister Benazir Bhutto, with France over the technology transfer of Agosta 90B class long-range submarines.:1975[10]