Arriving at Saint Joseph's in 1978, Zimmerman was the Athletics Department's first full-time woman employee and head coach for three varsity programs. During her four-year stay, she was the head women's coach for basketball, volleyball, and softball. At the inception of Title IX legislation, Zimmerman oversaw the transition of those respective sports from the Association of Intercollegiate Athletics for Women (AIAW) to NCAA Division III/ NAIA Division II. During her four-year tenure as the women's basketball coach, she went on to record a 52-28 (.666) record. In 1979 and 1981, Zimmerman coached the Monks to a Western Maine Athletic Conference Championship. She is also responsible for pioneering the women's volleyball and softball programs at Saint Joseph's College.