Jack passed away on June 30, 2025 at the age of 88. He retired from NASA in 1989 after a 30-year career at MSC/JSC.
The link to Jack's death notice is: https://neptunesociety.com/obituaries/league-city-tx/john-johnson-12439052
Jack's Obituary - https://everloved.com/life-of/john-henry-johnson/obituary/
A memorial service is pending.