After retiring from Griffith in 1959, Hall consulted for the Food and Agriculture Organization of the United Nations. From 1962 to 1964, he sat on the American Food for Peace Council. He died in 1971 in Pasadena, California. He was awarded several honors during his lifetime, including honorary degrees from Virginia State University, Howard University, and the Tuskegee Institute and in 2004 he was inducted into the National Inventors Hall of Fame for his work., football and track. He had the opportunity to choose between four colleges and he picked Northwestern University.