After completing her education, Sheridan worked as a newspaper reporter, editor, and photographer at the
Southern Dutchess News in
Wappingers Falls,
New York, from 1975 to 1977. While at the
Southern Dutchess News, she was elected as the first woman to be president of the Mid-Hudson News Association and she won several Heritage Media Awards for excellence in reporting and feature writing. Sheridan returned to Vassar College when she was hired as editor for the
Vassar Quarterly, the alumnae/i magazine. She continued at Vassar College for 27 years, becoming assistant to the president and finally vice president for college relations. At Vassar, she and her staff in college relations received 20 awards from the international
Council for Advancement and Support of Education for excellence in publications design and for strategic special events planning. At Vassar, she also was a founder, executive producer (1990–1996), and photographer (1984–2004) for the Powerhouse Summer Theater Program. In 1997, Sheridan was given the honorary title of vice president
emerita as she left Vassar to embark on a new career as free-lance photographer, and she quickly established herself in theatrical circles in New York. == Theater work ==