According to his WWI Draft Reg, his name is Abraham Isadore ZIMON; he also served WWI 10-3-1918/9-30-1921
Reviewing the city directories for MA, I find, except for the following, he was an atty in private practice.
1953 Director, Law Enforcement, Mass DC & T, Income Tax Div. 1961 Chief of Bureau, State DC & DCT [all in Boston] Possibly you have the Mass DC confused with Wash DC??
His obit is available from The Jewish Advocate, Boston. I just have a snippet view...names mentioned....LIBMAN, KOLODNY, CARP, COHEN, GOLDBERG.Perhaps obit will provide events that took place in his lifetime.