He was admitted to the Quebec bar in 1922 and set up practice in Joliette, in partnership with his fellow future legislator Maurice Majeau, among others.
In 1923, Tellier married Éva Bouvier.
He was named King's Counsel in 1938.
Tellier ran unsuccessfully for a seat in the Quebec assembly as a Conservative in 1935; he also suffered defeats when he ran for reelection to the Quebec assembly in 1939 and in 1962.
He was bâtonnier for the Laurentides area from 1957 to 1959.
He died in Montreal at the age of 69 and was buried in Joliette.
His uncle Louis Tellier was a member of the House of Commons.