Party affiliation: Republican
Leonard Eugene Zak, American lawyer. Bar: Illinois 1954. Board directors Mark Morton Memorial Fund, Chicago; special assistant to the United States Attorney General, 1967-1968. With United States Army, 1954-1956. Member American Bar Association, Chicago Bar Association, Illinois Bar Association, Tower Club (Chicago).
- Associate McBride & Baker, Chicago, 1956-1965, partner, 1965-1980. Vice president, general counsel Harza Engineering Company, Chicago, since 1980. Board directors Chicago Professional Society Insurance Service, Inc., Alpha Grove, Inc., Chicago, Tug Hill Operating Company Inc., Chicago.