The constituent service function covers activities such as answering constituent mail, managing casework, and coordinating service academy appointments. Sally Lounsbury was the principal staff assistant involved with managing constituent services in the Cohen office from 1974-1997.

This series consists of two boxes of  service academy applications and screening committee records. The applications are arranged alphabetically according to the last name of each applicant. Cohen was responsible for nominating high school students from the second district in Maine to the U.S. Naval, Air Force, Military and Merchant Marine Academies. Applications to the academies include photographs, letters of recommendation, transcripts, and Cohen's correspondence with the candidates. In 1973, Cohen created an Academy Screening Committee to assist him with these nominations, and correspondence and reports from this committee are also found in this series.

Casework involves working with federal agencies on behalf of individual constituents, so therefore casework files are confidential in nature, and most of them  were removed from Cohen's papers before they were transferred to the University of Maine.