Before becoming a costume designer, Everton was a costume supervisor on the hit 1984 film The Terminator. Her first film as costume designer was 1988's Bad Dreams, a horror thriller starring Richard Lynch and Harris Yulin. She worked on several more projects for that film's director, Andrew Fleming, including The Craft (1996) and Dick (1999, starring Kirsten Dunst, Teri Garr, and Saul Rubinek). After First Contact, she would again work with that movie's director, Jonathan Frakes, on his 2002 science fiction adventure movie Clockstoppers and an episode of the ABC series Masters of Science Fiction entitled "The Discarded" (written by Harlan Ellison).