 He was chairman from 1950 until 1965 of the planning board covering Harlem in the office of the Manhattan Borough President, overseeing the initiation of $400 million in public projects undertaken in that period.He worked for the New York City Department of Environmental Protection from 1968 until his retirement in 1970.Gregory died at age 88 on May 11, 1994, in his Manhattan apartment due to colon cancer.