After getting commissioned in the Pakistan army, Brig (R) Haris Nawaz joined the 18th Baloch Regiment which later was converted to the 3 Sind Regiment. He attended the school of infantry and tactics in Quetta and studied at command and staff college Quetta and Later he was also appointed as an instructor. He served as a brigade major of an infantry brigade before leaving for Saudi Arabia. He left for Saudi Arabia for his secondment in 1990 during the gulf war where Pakistan Armed Forces deployments included sending its military in support of Saudi Arabia. As the gulf war came to an end, he moved back to Pakistan where his achievements were recognized, and were promoted to a leadership position where he commanded an infantry regiment. He was later posted to the school of infantry and tactics as a chief instructor where his roles and responsibilities included training the young officers of the Pakistan army. He was appointed Colonel Staff of Infantry Division in Jhelum and commanded an Independent Infantry brigade at Badin Cantt from 1998 to 2001. He completed his master’s from National Defence University, Pakistan in defense and strategic studies and worked as director of joint warfare and training at joint staff headquarters Chaklala Cantt Rawalpindi until his retirement in 2004. Brig (R) Haris Nawaz spent most of his career in the army in instructional, command, and staff roles in Balochistan, Sindh, and Northern areas. He commanded the Northern Light infantry regiment at Siachen, the highest battlefield in the world.