He was named "Young Man of the Year" by the Norwalk Junior Chamber of Commerce in 1958.
He served as an officer in the 43rd Infantry Division of the Connecticut Army National Guard.
He was campaign treasurer for Connecticut's senior United States senator, Christopher Dodd, beginning in 1980.
[6][7] Zullo helped form and was president of the Connecticut Conference of Mayors.
[4] He served three years as a trustee and member of the executive board of the United States Conference of Mayors.