 He won the Luxembourgian Footballer of the Year at the end of the 2008-09 season, having scored 30 goals in 26 games for Differdange in the season.Piskor was virtually unknown until the summer of 2006, when he moved from Third Division FC Rodange 91 to Differdange.In his first season, he finished the 2006-07 season of the National Division as the league's second-top goalscorer behind Daniel Da Mota, scoring 25 goals including five goals in an 8-0 win against FC Mamer 32.