Career
Born in Iowa City, Iowa, Lehman received a Juris Doctor from the University of Wyoming College of Law in 1976. He practiced with the firm of Vehar, Lehman, Beppler & Jacobson, Professional Corporation, in Evanston, Wyoming. He served as a judge in Uinta County, Wyoming, from 1985 to 1988, and as a state district judge for Albany and Carbon counties.
On July 8, 1994, Governor Mike Sullivan appointed Lehman was to a seat on the Wyoming Supreme Court.
Lehman became Chief Justice in 2000, and was the first chief justice to serve a four-year term. He died from brain cancer, a month before he was scheduled to step down.