[1][2] In 1960, Dumont and Gérard Bolduc co-founded the Quebec International Pee-Wee Hockey Tournament with help from Pat Timmons, Jacques Boissinot, and Edmond de la Bruère.

[5][6] He was part of a group of businessmen who purchased the junior portion of the Aces from the Philadelphia Flyers in 1969, and established the Quebec Remparts in the inaugural 1969–70 QMJHL season.

[3][5] The QMJHL recognizes Dumont as one of its founding fathers in 1969, which sought to end the flow of Quebec-born players into the Ontario Hockey Association (OHA).

[7] On route to the 1971 national title, the Remparts were awarded the George Richardson Memorial Trophy by default in the Eastern Canada finals, and Dumont did not understand why the St. Catharines Black Hawks failed to continue the series.

[9] In February 1975, Dumont was one of the QMJHL representatives at a meeting with the CAHA, the OHA, and the Western Hockey League (WHL), which discussed the use of overage players, and its effect on Memorial Cup play.

[16] In 1982, he stated that eight of the nine teams lost money during the 1981–82 QMJHL season, due to decreasing attendance, and competition with professional hockey, for 18 and 19 year old players.

[19] He also felt that owning a junior ice hockey team was not a business venture for a quick return on investment, and that most owners were involved for the love of the game, and hoped to break even on expenses.