Sonko joined the Gambia Police Force in 1982 and was promoted to the rank of Corporal in 1984, and to Cadet Officer in 1988. He studied at the Nigerian Police Training School in 1990, and, upon his return in 1991, he helped to found the Police Intervention Unit (PIU) and was posted to Barra Police Station in the
North Bank Region. He was appointed as the force's first Public Relations Officer (PRO) in 1993 and was posted to
Kanifing Division as second-in-command in 1994. In 1995, he became the officer commanding Kanifing Division. He served as Inspector General of Police from March 2010 to 2014. He was replaced by Benjamin Wilson but was reinstated, in turn, to replace Wilson on 13 July 2015. == References ==