John Charles Zimmermann of West Lebanon, New Hampshire passed away Sunday, July 25, 2021. He was born June 25, 1932, in Stamford, and enjoyed sailing, both racing and instructing in his youth on Long Island Sound. Jack was graduated from Dartmouth College and completed graduate courses at Johns Hopkins University. He served in the Navy for almost four years, attending Officer Candidate School in Newport, Rhode Island, before being assigned as a communications officer on a destroyer in the Pacific. Jack gained promotion to lieutenant, completing his service as a small boat facilities master in Annapolis, Maryland, where he learned a great deal about making do and devising innovative solutions to challenging problems and processes.