He retired from CitiBank in December 2001 after 20 years with the bank as its government affairs officer.
His tenure in the state house ended in 1996, as he won a seat on the South Dakota Senate, representing the 10th district until his resignation on May 17, 2002.
Finance controversies took their toll on the mayor; and on February 2, 2006, Munson decided not to seek re-election.
This proved to be the correct choice for Munson who won by a small margin of just under 900 votes over challenger Bruce Halverson.
Munson was the subject of a number of skits on The Caribou Show.