Ohlgren is a former NCAA champion in the 400 y IM (2007) and 200 y IM (2008). At the 2007 Pan American Games, Ohlgren won the 200 m freestyle and swam the third leg of the 4x20 0m freestyle relay, which also won gold. Ohlgren competed at the 2009 World University Games and won five gold medals, the most for any athlete from Auburn.