He modified the 1984 character models originally designed by Shōhei Kohara and created the 1985 models, all of which became the visual guidelines both for the comic book and the animated cartoon appearances of those characters.
He was also charged with designing all the characters introduced in the movie: Galvatron, Cyclonus, Scourge, Unicron, Ultra Magnus,[1] Hot Rod/Rodimus Prime, Junkions, Quintessons, Springer, Blurr, Wheelie, Kup, and Arcee.
Dery is also known for illustrating the Sunday edition of the syndicated The Amazing Spider-Man comic strip from 1982 to 1992.
Dery worked alongside fellow Filipino Alex Niño as a storyboard artist for Sunbow Productions on Visionaries: Knights of the Magical Light.
He went on to be the production designer for Pirates of Dark Water and a storyboard artist for Spider-Man: The Animated Series.