A Republican, Voorhies won election as Wayne County Prosecutor in 1920 and 1922, serving from 1921 to 1925.[5]
In the late 1920s he was a Special Assistant Attorney General, working under Attorney General Wilber M. Brucker.[6] In 1930 Voorhies was the successful Republican nominee for Attorney General of Michigan, succeeding Brucker, and served from 1931 to 1933.[7]
Voorhies returned temporarily to the Wayne County Prosecutor's office in 1940, appointed after the incumbent had been removed on corruption charges.[8]
He died in Detroit on January 8, 1952, and was buried in Plymouth's Riverside Cemetery.[9]