Douglas A. Riniker

Command Staff
Title: Major- Second Deputy: Finance Division Commander
Phone: 319-892-6100
Major Doug Riniker

Major Doug Riniker started his career with the Linn County Sheriff’s Office as a Deputy Sheriff in 1995. He worked in the Correctional Center as a Deputy Sheriff for six years before transferring to the Patrol Division. He remained it the Patrol Division for five years until being promoted to the rank of Sergeant in 2006. Once promoted, he was reassigned to the Correctional Center. In 2009, he was appointed Second Deputy with a rank of Major, overseeing the Budget, Finance, and Civil Divisions. 

Major Riniker received his Associates of Arts degree in Police Science from Hawkeye Community College in 1994, a Bachelor of Science degree in Criminal Justice from Kaplan University in 2016, and a Master of Public Administration degree from Purdue University Global in 2017. Major Riniker is a graduate of the 262nd session of the FBI National Academy and the 78th session of FBI LEEDS. 

Major Riniker is the recipient of the FBI-LEEDA trilogy award. He has attended numerous training courses including training from FBI-LEEDA on Supervisor Leadership, Command Leadership, Executive Leadership, and Media and Public Relations. Major Riniker frequently presents on the topic of active shooter training and workplace violence at local businesses and organizations. 


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