After TNG wrapped production in 1994 , Williams joined DS9 as Visual Effects Series Coordinator, beginning with the third season episode "The Die is Cast" . He held this position on the series until at least the end of the sixth season, sometimes filling in as an episode's Visual Effects Coordinator throughout season four. During his time on DS9, he was simultaneously working as Visual Effects Series Coordinator on Star Trek: Voyager's first two seasons. He occasionally served as Visual Effects Supervisor for both series.