In military, in 1959, Zimmermann served as an officer and a pilot in the US Air Force and Air National Guard and Reserve, until 1989. Zimmermann is a lieutenant colonel. In 1968, Zimmermann became a commercial pilot for
Trans World Airlines, until his retirement in May 1995. In November 1985, Zimmermann became the author of
Hostage in a Hostage World: Hope Aboard Hijacked TWA 847. In May 1995, Zimmermann became a city council member of
Cascade, Idaho, and became council president. On November 3, 1998, as an incumbent, Zimmermann won the election unopposed and continued serving District 8, seat A. In April 2014, at age 74, Zimmermann became a pastor of Pilgrim Lutheran Church in
Ontario, Oregon. == Awards ==