McNassor has worked at Yeshiva University since 2019 in posts of increasing responsibility. McNassor retains the title of Associate Vice President of Advancement at YU while also leading the Cardozo advancement efforts.

McNassor has over fifteen years of experience in philanthropy. Her background includes a mix of non-profit and higher education appointments at the San Francisco Symphony, the Jewish Home of San Francisco and the University of North Carolina Kenan-Flagler Business School.