He started his college soccer career at Cal Poly Pomona and played there for the Cal Poly Pomona Broncos for two years. In 2002 Bornstein was California Collegiate Athletic Association (CCAA) Freshman of the Year, First-team All-CCAA, and second-team All-Far West Region, as he led the team in scoring. In 2003 he was again First-team All-CCAA and second-team All-Far West Region, and was selected to the College Sports Information Directors of America (CoSIDA) Academic All-America College Division District VIII team with a 3.30 GPA in Business Administration, as he led Cal Poly in all scoring categories. He finished his career at Cal Poly Pomona ranked 2nd in career assists (19), 3rd in career points (53), and 5th in career goals (19).