He played for Colgate University from 1987 to 1991. Undrafted by an NHL team, he turned pro with the Hampton Roads Admirals in 1991-92. After several years in the minor pro, Poapst was signed by the Washington Capitals. Poapst spent most of his time with the Portland Pirates, playing only 25 games for the Capitals over two seasons. In 2000 he signed as a free agent with the Chicago Blackhawks. He finally made it as a regular with the Hawks in 2001-02. In 2007 he was named coach and General manager of the Chicago Steel.