Dumais has competed for the United States at four Olympic Games, winning a team bronze medal in the synchronized 3m in 2012.

Troy Dumais previously trained under coaches Van Austin, Tom Scotty and Jeff Shaffer.

[3] At the 2011 US National Championships in August, Dumais teamed with Kristian Ipsen to win the synchronized men 3-meter springboard at UCLA's Spieker Aquatics Center.

[4] In June 2012 Dumais gained the second spot representing the United States in the 3m springboard individual event at the London 2012 Summer Olympics the following month.

He also, along with his 3m synchro partner Kristian Ipsen, qualified at the same U.S. Olympic Team Trials held in Federal Way, Washington to represent the United States at the games.