In 1956, Mina and Don returned from Italy. She applied for dozens of teaching positions at the collegiate level without success. Instead, she accepted a position at
McGraw Hill as an editor. She would work at McGraw until 1961 and be responsible for editing major books and supervising other editors. In 1961, Shaughnessy resigned from McGraw Hill and enlisted to teach night courses in composition and literature at
Hunter College. She would teach these night classes at Hunter College for five years. In 1962, she assisted Raymond Fosdick again in researching educational trends and policies in the South. In 1964, she accepted a full-time position at
Hofstra, where she would teach until 1967, a full-time day position in an English department. At Hofstra, she taught freshman composition, and advanced writing and grammar courses. During this time, she met many other faculty members who would support her in open admissions, such as
Marilyn French and
Alice Stewart Trillin. In 1967, she and
Stewart Trillin were both offered positions to teach at
City College of New York (CCNY) as part of the Pre-Baccalaureate Program, a program designed to increase the chances of higher education for those traditionally barred from entering colleges and universities due to grades or lack of money. The program offered counseling, stipends, and remedial classes to help these students gain the skills they would need to succeed in college. The Pre-Baccalaureate Program would be renamed SEEK (Search for Education, Elevation, and Knowledge) and continued to grow. As Shaughnessy was beginning to teach at City,
Anthony Penale suffered a heart attack, and Shaughnessy was quickly recommended to replace him as the director of the program. ==Director of the SEEK Program at City College of New York==