Daniel P. Hickson began his career with the Metropolitan Police Department in 1973 when he became a Police Cadet. During his early years, he served as a police officer in both uniform patrol and tactical assignments while assigned to the First District and the Special Operations Division, Tactical Branch. In 1978, Hickson began serving in investigative assignments within the Narcotics Branch and the Criminal Investigations Division. In 1992, Daniel Hickson was promoted to Sergeant and was assigned to the Fourth District. He was promoted to Lieutenant in 1994 and assigned to the Fifth District, where he remained until being transferred to the First District as an Acting Captain and the Commander of the First District Support Sector. Hickson retired from the Metropolitan Police Department in 1996.
Since his retirement from MPD, Hickson has worked for several universities and as a contract Special Investigator with the Federal Bureau of Investigations for eight years. In 2008, he returned to the Metropolitan Police Department where he served as the Intelligence Branch Director, advising the Chief of Police and Command Staff on all criminal intelligence issues.
In December 2009, Daniel Hickson was promoted to the Commander of the Criminal Investigations Division (CID). During his tenure, CID has continued to excel, having been recognized for outstanding performance and innovative investigative techniques on several occassions.
In June 2011, Hickson was named Commander of the First District.