Captain Michael Dierkes was born in St. Louis, Missouri, and he currently resides in the South County area. Captain Dierkes earned his Bachelors of Science Degree from Sterling University of Kansas. Captain Dierkes has been assigned as the Commander of the Affton Southwest Precinct. He is responsible for the day to day operations of a precinct that provides police protection to the unincorporated areas of Affton, Mattese, Sappington and Concord Village, along with the incorporated areas of Grantwood Village, Marlborough, Wilbur Park and Green Park.
Captain Dierkes began his career in 1988 and served in the South County and Affton Precincts. He also served in the Division of Criminal Investigation - Bureau of Drug Enforcement, which included a tour of duty, where he was detached to the Drug Enforcement Administration. He then served in the Division of Special Operations -Tactical Operations Unit, until he was promoted to the rank of Sergeant in 1997.
After tenure in the Affton Precinct, Captain Dierkes was transferred to the Division of Criminal Investigation - Bureau of Drug Enforcement and later transferred to the Division of Special Operations Tactical Operation Unit. In 2003, he served as a supervisor in the Bureau of Criminal Identification and the Bureau of Crimes Against Persons. In 2006, he was promoted to Lieutenant and was assigned to the South County Precinct.
In June 2008, Captain Dierkes was transferred to serve as the Commander of the St. Louis County Police Department Crime Laboratory. In this position, he planned, organized and directed the operations of all sections of the laboratory which include DNA / Biology, Firearms and Toolmarks, Chemistry and Photography. In 2009, Captain Dierkes was assigned Commander of the Municipal Services Unit, and he was promoted to his current rank and placed in his current command in 2010.