Our Team of Talented Insurance Specialists


The Insurance Group

Since 1949, The Insurance Group has provided individuals and businesses in the Clinton area with exceptional service and insurance products. As an independent agency, we represent many insurance companies and can offer a variety of choices to customize a plan to meet your unique needs. We are dedicated to you and are committed to treating you as a person, not a policy.

Insurance Built Around Your Needs and Requirements

The Insurance Group

Since 1949, The Insurance Group has provided individuals and businesses in the Clinton area with exceptional service and insurance products. As an independent agency, we represent many insurance companies and can offer a variety of choices to customize a plan to meet your unique needs. We are dedicated to you and are committed to treating you as a person, not a policy.

Our Team

Mark Mangler

President
Mark is a graduate of Clinton High School and Kirkwood Community College. He started his insurance career in 1982 and joined The Insurance Group in 1994. He is the President of the agency. He holds the Life Underwriter Training Council Fellow (LUTCF) designation and is licensed in all lines of insurance in Iowa and Illinois. He is active in the community and has served on many committees and boards.

Diane Christensen

Vice President
Diane began her career with The Insurance Group in 1977 as a receptionist. She is currently the Vice President. Her responsibilities include selling and servicing personal and commercial clients with their insurance needs. She is licensed to do business in Iowa and Illinois. Diane is very active in the Clinton and Fulton communities and in various organizations.

Mike Determan

Producer/Agent
Mike joined The Insurance Group in 2007 with 15 years of sales and customer service experience. Mike is licensed in Iowa and Illinois for property, casualty, life, health, and crop insurance. He belongs to and volunteers with several organizations in the community. Mike’s focus is to help clients develop and maintain an insurance program to meet their specific needs.

Drew Mangler

Agent
Graduated from Clinton high school in 2003 and served in the US Army from 2003 to 2009 as a Cavalry Scout with two combat deployments to Iraq. Graduated from the University of Iowa in 2013 with a Bachelor of Arts and then worked in commercial lines underwriting for United Fire and Casualty in Cedar Rapids from 2014 to 2017. Joined the Insurance Group in 2017.