Decker is a graduate of St. Ambrose University in Davenport, Iowa with a B.A. in Criminal Justice, and a graduate of the FBI National Academy, Quantico, Virginia, and the National Crime Prevention Institute at the University of Louisville and the Iowa Law Enforcement Academy.

He is Past President and current member of the Bettendorf Rotary Club, Vice Chair for the Board of Medic Ambulance Corporation, serves on the Board of Directors of the Illowa Boy Scout Council, he serves as Chairperson for the Board of the First Tee of the Quad Cities, the Chairperson of the Quad City Health Initiative, the Chairperson of the Quad City Local Emergency Planning Council and is a member of the Board of Directors for the Center for Active Seniors (CASI), and is a Past Volunteer Chairman of the John Deere Classic PGA Golf Tournament and Past President of the Board of Directors and current member of the Iowa City Managers’ Association.

Decker has been the Bettendorf City Administrator since 1990.  He also served the City as Chief of Police from 1986 through 1990 and prior to that held positions of Detective Sergeant, Detective, and Patrolman and started his career with the city in 1975.

Decker is married with two adult children.  He and his wife, Jayne, reside in Bettendorf.