 He subsequently agreed to a new two-year contract.On 2 June 2018, Kiselevich as a free agent signed a one-year, one-way contract with the Florida Panthers of the NHL for the 2018–19 season.After attending the Panthers 2018 training camp, Kiselevich made the opening season roster, he made his NHL debut with Florida in a 3-2 defeat to the Vancouver Canucks at the BB&T Center in Sunrise, Florida on October 13, 2018.