Shaun Lyon has written two short stories for Big Finish's Short Trips range, as well as Back To The Vortex: The Unofficial and Unauthorized Guide to Doctor Who 2005 and Second Flight: Back to the Vortex II - The Unofficial and Unauthorized Guide to Series Two, covering the first two seasons of the new Doctor Who TV series, for Telos Publishing. He has also written numerous articles for Doctor Who Magazine, as well as co-edited (with Mark Phippen) the 2000 charity fan anthology Missing Pieces (in which he wrote two short stories, one under his own name, the other under the pseudonym Lorelei Jordan.) More recently, Lyon contributed to the essay anthology The Companions of Doctor Who ("The Songs of Donna Noble") and has written for author Stacey Smith?'s essay anthology series, Outside In.
Lyon is the co-founder, program director, and master of ceremonies of the Los Angeles-based Gallifrey One convention, which bills itself as "the largest and longest-running annual Doctor Who convention in the world." The event has operated every year since 1990 (except in 2021, due to the COVID-19 pandemic.)
From 1995 until the site's closure in 2009, Lyon was the creator and editor of Outpost Gallifrey, the prominent Doctor Who website, and the accompanying Doctor Who Forum. The forum's successor, Gallifrey Base, was launched several weeks later. Lyon also ran a news distribution & networking service via email, The Doctor Who Alliance of North America, from 1998 to 2003, and was heavily involved in the Time Meddlers of Los Angeles Doctor Who club from 1987 to 2000, and the short-lived L.A. Doctor Who Viewing Society (LADWVS) in the late 1990s.
He was interviewed on the Doctor Who Confidential episode The World of Who.