Randy McIlvain was a Starfleet officer in the 24th century.
In the 2370s, he was named as a Research and Development officer on the dedication plaque of Defiant-class starships. (DS9: "The Die is Cast", dedication plaque; DS9: "Valiant", dedication plaque; DS9: "The Dogs of War", dedication plaque)
This character was only mentioned in writing.
McIlvain, who was listed on various pieces of background artwork, was named for production staff associate Randy McIlvain.
He was listed as a member of Fleet Ops at Utopia Planitia Fleet Yards on the dedication plaque of the USS Odyssey. This plaque was made for the Star Trek: Deep Space Nine episode "The Jem'Hadar", but did not make an appearance in the episode. This plaque can be viewed at the twitter account of DS9's writer and producer Ira Steven Behr. [1]