Career
The first time from 1921 to 1930 sitting with the United Farmers caucus in government and the second from 1952 to 1955 sitting with the Social Cr caucus in government. Joly ran for a seat to the Alberta Legislature as a United Farmers candidate in the 1921 Alberta general election in the Saint Paul electoral district. Joly ran for a second term in the 1926 Alberta general election.
He increased his popular vote easily winning the three way race to hold his seat.
Joly ran for a third term in office in the 1930 Alberta general election. He was defeated in a hotly contested two way race losing by just 18 votes to Liberal candidate Joseph Dechene.
He ran against Dechene and Social Cr candidate Joseph Beaudry. The race was hotly contested.
Dechene was defeated by Beaudry on the second count while Joly finished a distant third place.
Joly retired from provincial politics at dissolution of the Assembly in 1955.