Stef Marinus Wijlaars (born 19 January 1988) is a Dutch former professional footballer who played as a midfielder. After his playing career, he began working as a youth coach.
He previously played for FC Den Bosch, FK Senica and Sigma Olomouc. He retired as part of amateur club Gemert in 2015 due to injuries.
In 2017, Wijlaars initiated his career as a youth coach within the Den Bosch youth academy, eventually becoming head of the academy. His trajectory led to his appointment, in 2023, as the coordinator for middle-tier youth teams (under-13 to under-16) at Ajax.