The assistant chief engineer or assistant engineer was the primary assistant or backup to the chief engineer.
In situations when the chief engineer was away from the engine room, the assistant chief engineer was responsible for overseeing engineering until the chief engineer returned. (TNG: "The Naked Now")
If a chief engineer was either incapacitated or killed in action, the assistant chief engineer was made chief engineer. (VOY: "Caretaker", "Parallax")
List of assistant chief engineers[]
- Jim Shimoda (2364)
- Lieutenant junior grade Singh (2364)
- Ensign Clancy (2365)
Unnamed Y-500 class freighter