Mark Prosser was born and raised in East St. Louis, IL. After college, he became a police officer for the City of O'Fallon, Ill., a suburb of St. Louis, Mo. While in O'Fallon, he moved through the ranks of the department between 1980 and 1989. He reached the rank of Chief of Detectives in 1986. He further served for five years as an Investigator and Supervisor for the St. Louis Major Case Squad, multi-jurisdictional homicide unit.
Prosser was hired as Chief of Police in Storm Lake in October of 1989 and was named Public Safety Director in June of 2000 where he still serves. He is a life member and Past Executive Board member of the International Association of Chiefs of Police, is a member and Past President of the Iowa Police Executive Forum now known as the Iowa Police Chiefs Association and is a member of the Police Executive Research Forum. Prosser is a current member of the Law Enforcement Immigration Task Force. Prosser taught for 19 years at the Illinois Police Academy, Buena Vista University and Iowa Central Community College.
Prosser has spoken at state and regional conferences in Iowa, Minnesota and Illinois on topics such as management, administration, budgeting and grant writing. Prosser speaks extensively throughout Iowa on issues related to diversity and shifting demographics and has presented in New York, Washington DC, Seattle, Minneapolis and for the US Attorney’s Office in Nebraska.
Prosser holds a Bachelor of Science Degree in Police Administration and has completed some Graduate Studies in Public Administration and Management. Prosser has completed formation courses of study in Theology at Briar Cliff University and through the Sioux City Catholic Diocese.
Prosser is the chairman of the Buena Vista County 911 Board and serves on the Buena Vista County DECAT Board. Prosser chairs a variety of internal organizational committees for the City of Storm Lake. He is a charter member of the Storm Lake Diversity Committee. Prosser has served on a variety of boards in and around Storm Lake including but not limited to board chairman and vice board chairman positions for the United Community Health Center and Faith, Hope and Charity.
Prosser was named Law Enforcement Executive of the Year for 2016 by the Iowa Police Chief’s Association.
Prosser is one of two recipients in the State of Iowa of the 2017 Dr. Martin Luther King Jr., Achievement Award.
Prosser is an ordained Deacon in the Catholic Church and serves the St. Mary’s Parish Cluster in Storm Lake, Iowa. Prosser serves on a variety of committees for St. Mary’s Parish.
Prosser is married and has one adult daughter.