Pierre Filion established the Quebec provincial lacrosse governing body from the ground up. He was hired in 1975 as Technical Director of the Fédération de crosse du Québec, and subsequently drafted a constitution, bylaws, operations manual, incorporated the Federation, and established a democratic procedure.
In 1975 he created the QSLL, a QJLL and in 1976 three more juvenile leagues. Filion organized 14 regional lacrosse associations and managed provincial minor championships and Québec Games. He organized provincial and regional lacrosse clinics for coaches. Filion created the Québec Team Program at the Canada Games. In 1977 the Fédération de crosse du Québec presented a request on behalf of the CANAM League to obtain membership within Lacrosse Canada and thus access annually the Presidents’ Cup (the Senior B championship of Canada). Filion organized field and women’s programs in Québec and Intercrosse in QC schools. He was also very involved in the international development of lacrosse.