Lieutenant Norman Mann began his career with the St. Louis County Police Department in 2001, as a Police Aide in the Vehicle and Supply Unit. Upon graduating from the St. Louis County and Municipal Police Academy in December of 2001, he served in the North County Precinct, to include the City of Black Jack. In January of 2003, he was transferred to the Personnel Services Unit as a Background Investigator, where he recruited and conducted background investigations on potential hires to the Department. In January of 2006, Lieutenant Mann was transferred to the Bureau of Professional Responsibility, where he investigated potential violations of departmental policies and procedures in an effort to maintain the professional standards of the St. Louis County Police Department.
In August of 2006, he was promoted to the rank of Sergeant and assigned to the Central County Precinct. In June of 2009, Lieutenant Mann was transferred to serve as the Chief's Aide in the Office of Chief of Police. In June of 2010, he was assigned as the Supervisor of the Domestic Violence Unit in the Bureau of Crimes Against Persons. In October of 2010 he was promoted to Lieutenant and assigned as Watch Commander of the Central County Precinct. In April of 2012, he was transferred to the North County Precinct to assume the duties of the Commander of the newly formed City of Dellwood Detail. In July 2013 he assumed his current position as Commander of the Intelligence Unit.
Lieutenant Mann graduated from McCluer High School in 1996, and earned a Bachelor's Degree in Criminology and Criminal Justice from the University of Missouri-St.Louis in 2001. In 2005, he completed his Master's Degree in Legal Studies from Webster University, where he also obtained a certificate in Paralegal Studies. Lieutenant Mann is a member of the Fraternal Order of Police and the National Organization of Black Law Enforcement Executives.