John Graham-Cumming

John Graham-Cumming
John Graham-Cumming in 2010
Alma materUniversity of Oxford (DPhil)
Known forPOPFile
The Geek Atlas
Scientific career
InstitutionsCloudflare (Board of Directors)
Cloudflare (Former CTO)
Electric Cloud
Thesis The formal development of secure systems  (1992)
Doctoral advisorJeff W. Sanders
Websitewww.jgc.org

John Graham-Cumming is a British software engineer and writer best known for starting a successful petition to the Government of the United Kingdom asking for an apology for its persecution of Alan Turing. UK Prime Minister Gordon Brown issued the apology in September 2009.As of 2025, Graham-Cumming is a member of the Board of Directors at Cloudflare, where he previously served as the company's Chief Technology Officer until March 2025. Prior to joining Cloudflare, he co-founded Electric Cloud.