Career
He was reelected in 1968, and 1970. In 1972, Mussey opted to move to the Ohio Senate, following another redistricting process that left incumbent Senator Oakley Collins out of the district. By 1979, Mussey had been chosen by Ohio Governor Jim Rhodes to serve on the Ohio Industrial Commission, and resigned on March 30, after serving as a legislator for over twelve years.
He was replaced by Cooper Snyder.
He would serve on the commission for a portion of the 1980s, before retiring to Columbus, Ohio.