Air Marshal Amosu started his flying career at 301 Flying Training School Kaduna. He proceeded to 303 Flying Training School Kano for his Basic Flying Training. He was thereafter deployed to the 99 Air Combat Training Group Kainji for type-rating on the Alpha-Jet aircraft. The senior officer attended both the Junior and Senior Command and Staff Courses at the Armed Forces Command and Staff College, Jaji. Thereafter, he attended the prestigious National War College, Nigeria and later went to University of Ibadan where he obtained Master of Science degree in Strategic Studies.