The Ottawa 67s blueliner, selected in the fourth round (124th overall) of the 2021 NHL Draft, finished the tournament +4, with one assist through seven appearances.
Matier previously won gold with Canada's U-18 squad at the 2021 IIHF U-18 Championship in Frisco, Texas.
Defenseman Ryan Ufko, also selected in the fourth round (115th overall) of the 2021 draft, helped Team USA to a bronze medal, tallying two points (1g-1a) in the team's 8-7 overtime win over Sweden.