Dix graduated from Harvard University and received a Masters of Architecture from the University of Pennsylvania.
He started his architectural career working for several large firms in the Boston area. He then opened his own architecture firm, concentrating on educational institutions and private residences.
Dix was an avid outdoorsman, with his interests including fly fishing, bird watching, astronomy, nature photography, kayaking, skiing and tennis. After retirement, he was involved with several conservation projects including the Judith K. Record Memorial Conservation Fund, the Belmont Land Trust, and the Massachusetts Audubon Society. Private services.