Career
He represented Shellbrook-Torch River from 1982 to 1991 in the Legislative Assembly of Saskatchewan as a Progressive Conservative. He was born in Prince Albert, Saskatchewan, the son of Ernest Muller. In 1958, Muller married Doreen Lillian Rask.
He served as deputy speaker in the Saskatchewan assembly.
Muller lived in Shellbrook. He was defeated by Jack Langford when he ran for reelection to the assembly in 1991.