He is the co-founder and publisher of the swimming news website, SwimSwam, and a producer-director of commercials through his company, Gold Medal Media.

[1] At the 1988 Summer Olympics in Seoul, South Korea, Stewart placed fifth in the men's 200-meter butterfly with a time of 1:59.19.

After the 1996 Summer Olympics, Stewart hosted a season of a television show titled "American Outback" on ESPN.

Two years later, he began serving an ambassador to the United States Swimming Foundation, where one of his focuses since 2008 has been managing alumni of the US national team.

[8] In 2011, Stewart and a team of co-founders, including his wife Tiffany, Braden Keith, Gary Hall Jr., Garrett McCaffrey, and Rich Roll, founded the swimming news website SwimSwam.