He pursued his post-secondary education in India and earned a first-class Bachelor of Science degree in Information Technology in 2003 from Osmania University.

Diano also studied administration and management, politics and strategy and military intelligence in addition to his regular courses.

After returning from his studies abroad in India, Osman Abdullahi joined the Puntland Security Force as Director General and served for 14 years.

On September 26, 2024, the Cabinet of Somalia approved General Asad Diyano as the new chief of the Somali Police Force.

The Minister of Internal Security, Abdullahi Sheikh Ismail Fartaag, officially transferred the leadership duties to Diyano at the ceremony.