Dr. Paul B. Ash has served as Superintendent of the Lexington Public Schools since 2005. Previously, he served as the Superintendent of Schools in the Westwood, Massachusetts Public Schools from 1998 to 2005. He has also held the following positions in the Wellesley, Massachusetts Public Schools - Director of Professional Personnel and Staff Development; Assistant Superintendent for Personnel, Finance and Administration; Assistant Superintendent for Personnel and Planning; and Interim Superintendent of Schools. He started his career in education as a chemistry/physics/earth science teacher at