A three-sport athlete at Brien McMahon, van Geldern was a nenber of the varsity soccer and lacrosse teams and was a member of the outdoor track team. She was an All-Fairfield County Interscholastic Athletic Conference First Team selection for two seasons and was an All-Area Team MVP pick. She captain her squad for two seasons and was an All State Honorable Mention. She currently holds the school record with 548 career saves and 14 shutouts.