In the
Ghana Police Service, Acheampong first worked as a prosecutor at the law courts in
Accra from September 1976. He was then appointed the Executive Secretary to the IGP at the Ghana Police headquarters in June 1979. During the
PNDC era, he became the Assistant Special Public Prosecutor at the Office of the Special Public Prosecutor of the National Public Tribunals of Ghana, a function he performed till June 1986. He was the District Police Commander for
Tema Community One from May 1982 to June 1984. From May to August 1986, he became the Accra Central District Police Commander. He then worked as the Officer in charge of Special Duties at the National Police Headquarters until October 1988. He was next posted to the
Northern Region of Ghana as the Deputy Regional Police Commander in February 1990, a position he held for the next two years. Acheampong was the Regional Police Commander in the Northern and then the
Ashanti Regions between February 1992 and October 1996. He then worked at the National Police Headquarters in
Accra as the Deputy Commissioner in charge of Administration.
International assignments Acheampong was the Deputy Contingent Commander of the United Nations Peace Keeping Operations in
Bosnia and Herzegovina for a year beginning March 1997. Between March 1997 and May 1998, he was an instructor at the UNCIVPOL Pre-Mission Training School at
Sarajevo,
Bosnia while attached to the ‘Sarajevo Center' Police Station Investigations Unit. He performed the same instructor role at the UNCIVPOL Pre-Mission Training School at
Zagreb,
Croatia between May and September 1998.
Return to Ghana In September 1998, he was appointed the Commandant of the Ghana Police College. He is credited with overseeing the re-organisation and restructuring of the college. He became the Director,
Criminal Investigation Department (CID) in February 2001. It was during his tenure that the serial murderer
Charles Quansah was arrested. In August 2002, he became the Deputy Inspector-General of Police (Operations) and was also the Acting chairman of the National Election Task Force which supervised the security arrangements for the 2004
presidential and
parliamentary elections in Ghana in December 2004. On 25 March 2005, he was appointed by
President of Ghana,
John Kufuor as the Inspector General of Police, his 54th birthday. ==Retirement==