Jack Clemons
American aerospace engineer (1943–2024)
Jack Clemons (November 9, 1943 – May 29, 2024) was an aerospace engineer and air and space industry professional. He was a lead engineer on NASA's Apollo and Space Shuttle Programs, and later an aerospace company executive. He appeared as himself in the "Command Module" episode of the 2008 Discovery Science Channel six-part documentary Moon Machines. He also appeared as himself in the 2019 National Geographic Channel documentary Apollo: Back to the Moon. Following retirement from the aerospace industry, Clemons was a consultant and a professional writer as well as a speaker and presenter on NASA's space programs.
Career
Jack received his bachelor's and master's degrees in Aerospace Engineering from the University of Florida. During the Apollo Moon Program he was a lead engineer at TRW Systems Group in Houston, Texas, supporting operations at NASA's Manned Spacecraft Center (now the Johnson Space Center). He developed procedures allowing astronauts to monitor the Apollo Command Module Onboard Guidance and Navigation Computer during atmospheric reentry, and to control the reentry manually should they need to override the computer. He provided real-time reentry support during missions Apollo 9 through Apollo 14, including NASA Mission Control Center backroom support during the extended five-minute reentry blackout period on Apollo 13.
Following Apollo, at IBM Federal Systems in Houston, he was the overall program manager for the development of the onboard software for NASA's Space Shuttle.
This brief starts where responsible research should: with the source description of “Jack Clemons” as american aerospace engineer (1943–2024). Everything that follows is an evidence route, not borrowed authority.
Why this record matters
The subject matters to the people & ideas register because the source frames it as american aerospace engineer (1943–2024). Its deeper value depends on whether names, dates, institutions and citations support that framing.
Chronology provides the most reliable spine for this subject; interpretation should follow only after identities and dates are secure. The source revision retrieved here is dated Mar 7, 2026. The linked authority identifier is Q6111709. VIAF identifies the subject as 23153773433361430791. The Library of Congress control number is no2018123432. 2 of 3 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1943, 2024, 2008 and 2019.
A concise life account rarely captures disputed attribution, private networks or the changing language used to describe a career. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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Three-step research path
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This entry incorporates text from “Jack Clemons” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.