He got commission in the Operations branch in 1971. Mohammad Haroon joined the elite Submarine Squadron in 1972, He is the only officer in Pakistan Naval History to have commanded three Submarines and a Type 21 Frigate. He also has the longest sea time in years than any other officer in Pakistan Navy.
He is a graduate of Naval War College, United States of America and did his National Defence Course from National Defence University, Islamabad.
He retired from active service as Vice Chief Of Naval Staff in 2007. As a junior officer, he served on board various units of the fleet and later joined submarine service in 1972.
His important appointments include command of a Gun Boat, three Submarines & a Destroyer. He has also been Commander Submarine Squadron.
His Staff appointments include Director Submarine Training Center, Commander Operations & Sea Training to Commander Submarine, Doctor of Science War Wing National Defence College, Assistant Chief of Naval Staff (Plans) at NHQ and a diplomatic assignment as Naval Attaché at New Delhi (India).
His services in India were recognized and Mohammad Haroon was awarded with Tamgha-e-Basalat (military) by the President of Pakistan. He was promoted Rear Admiral in 1999 and then served as Director General (Training) JSHQ for two years. He was then appointed as Commander Karachi in 2000.
He served as Commander Pakistan Fleet (COMPAK) in the year 2004-2005 and later appointed as Vice Chief of Naval Staff on 07 November 05.
After his retirement from the Navy (2007) he joined Bahria University in February 2009 as the Chief Executive under the designation of Rector (President). Since his appointment he has help change the way things were working in Bahria University.
His untiring efforts helped Bahria University regain the "West" rating based by the Higher Education Commission of Pakistan. He has been looking after different international linkages and has been successful in forming linkages with top notch Chinese Universities.
Mohammad Haroons work as Rector Bahria University streamlined previous administrative defects such as hiring of new professores, staff development, quality enhancement, policy formulation, assessment & evaluation, planning & development, capital handling, international & national collaborations, et cetera
He has been part of various educational conferences & seminars including 17th Conference of Commonwealth Education Ministers (Malaysia), Indian Ocean Naval Symposium (Australia) & International Maritime Conference (Pakistan). He is an avid reader and has always been an outstanding sportsman. He has also recently enrolled for a Doctor of Philosophy in Military Studies.