Ruyssen played for Dender since January 2023, who removed him from RWDM. He wore the shirt of the club from Denderleeuw in 76 games (2 goals) and in 2024 participated the promotion to 1A. Last season he came into action 38 times for Dender, which was twelfth in the regular competition and fourth in the Europe Play-Off.
Kortrijk tumbled from 1A last season after a third place in the Relegation Play-Off. It was the first relegation since 2008.