Hardt was selected Rookie of the Year in the Danish ice hockey league in 2007, where he represented the Herlev Hornets.[1] Despite his relatively small stature, Hardt is known for his physical style of play, throwing many hits while being a relentless forechecker.
He became the first Danish player to play in the top Finnish league, the SM-liiga, when he joined Tappara towards the end of the 2007–08 season. In the playoffs, he enjoyed considerable success for Tappara, registering 4 goals and 3 assists in 11 games as Tappara went on to finish third in the playoffs and win the bronze medals.