25 Mar 1998 - 08 Apr 2016 (Retired/Retraite)

Bishop Thériault was ordained as a Bishop on 01 June 1998.

He also took the decision to incardinated clergy in 1999 IAW with the Particular Statutes.

On 30 march 2009, he obtained approval from the Congregation of Bishops for new Particular Statutes of the Military Ordinariate of Canada.

Born in Paquetteville, New Brunswick, on January 18, 1946, he received a Bachelor of Arts degree from the University of Western Ontario in 1968. The new Bishop-elect was ordained to the priesthood for the Diocese of London on May 8, 1971 after completing his theological studies at St. Peter’s Seminary in London. He then received his master’s degree, with a specialization in liturgy, from the Institut catholique de Paris, France, in 1977. Bishop-elect Thériault is also the current pastor of St. Francis Xavier Parish in Tilbury, Ontario. He has been president of the London Council of Priests; vice-president of the London Liturgical Commission, judge of the London Marriage Tribunal; chaplain to French-language public schools in the London area; a member of the Ontario Liturgical Commission; a captain with the Canadian Forces Reserve, and a summer chaplain for the Canadian Forces Air Cadets.