 A resident of Pennington, New Jersey, Billmeier attended The Pennington School there for his freshman year, and then transferred to St. Patrick High School in Elizabeth, New Jersey where he played for the remainder of his high school career.He wore the number 33 at St. Patrick's, but wore 41 at Seton Hall his freshman and sophomore years because the number 33 was already taken by Andre Sweet.Upon Sweet's graduation, Billmeier had his number changed back to 33.