After retiring from the police department, Ratermann taught geometry and algebra at Riverview Gardens High School and then at the St. Louis NJROTC High School. A veteran of the U.S. Marine Corps Reserve and the U.S. Army Reserve, Ratermann also was a security police officer for the National Geospatial-Intelligence Agency.
The Governor has nominated Ratermann for a term ending March 15, 2020. The nomination will be subject to confirmation by the Missouri Senate.