At the 2012 European Short Course Swimming Championships in Chartres, France, Timmers earned his first two career medals in an international competition. In the 200 m freestyle, he touched second behind Agnel with a new short-course Belgian record of 1:43.08. Timmers also solidified his Belgian team (Vanluchene, Grandjean, and Aerents) with a bronze in the 4×50 m freestyle relay, posting a time of 1:25.60.