[3] Bernard-Docker played peewee ice hockey with a AA team in Cochrane and a bantam AAA in Airdrie, Alberta[4] before enrolling at the Edge School for Athletes with his two younger siblings.

[4] While serving as captain of the Airdrie Extreme bantam AAA team, Bernard-Docker was drafted in the fifth round, 98th overall, by the Swift Current Broncos of the Western Hockey League.

In February 2017, Bernard-Docker committed to play for the University of North Dakota Fighting Hawks men's ice hockey team.

[8] Bernard-Docker returned to the Oilers for the 2017–18 season where he greatly improved offensively and received numerous awards including the CJHL's Top Defenceman and W.G.

[2] Bernard-Docker scored 20 goals and added 21 assists for 41 points through 49 games in order to tie sixth in offensive production among all AJHL defencemen.

[17] As a result of his improved play, Bernard-Docker was selected to participate with Team Canada at the 2020 World Junior Ice Hockey Championships.

[18] Once collegiate hockey resumed in November 2020, Bernard-Docker was named an assistant captain for the Fighting Hawks alongside Mark Senden and Jasper Weatherby.

[20] On April 1, 2021, Bernard-Docker signalled the end of his collegiate career by signing a three-year, entry-level contract with the Ottawa Senators.

[22] Once the season concluded, Bernard-Docker was selected to replace New Jersey Devils' defenceman Kevin Bahl for Team Canada during the 2021 IIHF World Championship.

[23] Upon returning to North America, Bernard-Docker skated with members of the Senators roster instead of participating in the teams' development part of preseason camp.