For almost forty years, Ms. Mossaides has held a wide range of positions in the public and independent sectors as an attorney and administrator. Before assuming the position as the Child Advocate for the Commonwealth, she was the Executive Director of Cambridge Family and Children’s Service. She served as the general counsel and acting commissioner of the Office for Children, deputy general counsel to the Department of Social Services, general counsel to the Office of the Comptroller, and as the first agency head for the Division of Purchased Services. For nine years Ms. Mossaides worked for the Supreme Judicial Court of Massachusetts, first as the Executive Assistant to Chief Justice Paul J. Liacos and then as the Administrative Assistant to the Justices, the first woman appointed to the position.
Ms. Mossaides graduated cum laude from Mount Holyoke College, received her law degree from SUNY at Buffalo, and a masters in public administration from the Kennedy School of Government at Harvard University where she was awarded the Bradford Fellowship.