John Sadden is an archivist who has worked in public libraries, specialist libraries, Highbury College and the University of Portsmouth, while also working as a writer and indexer. He qualified as a chartered librarian while working at Petersfield Library, and has since worked at Fareham and Gosport Libraries, having responsiblity for various local studies collections and also the Hampshire Naval Collection. More recently John took up the post of archivist at Portsmouth's oldest school, The Portsmouth Grammar School.