Career
From 2009 to 2012, Thill played for CS Pétange of the Luxembourg National Division, scoring 9 goals in 46 league appearances. In 2013, he moved to fellow National Division side Football Club Progrès Niederkorn. In 2015, Thill made his debut in European club competition as Niederkorn fell 0–3 on aggregate to Shamrock Rovers in a two-leg series during the first qualifying round of the 2015-2016 Union of European Football Associations Europa League.
Thill made his senior international debut for Luxembourg on 5 September 2015 in a Union of European Football Associations Euro 2016 qualifying match against Macedonia.
In the match, Thill scored in second-half stoppage time for his first international goal as Luxembourg earned a 1–0 victory, lifting them from the bottom position in Group C.
International goals
Score lists Luxembourg"s goal tally first.