Assistant chief engineer

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. ()
If a chief engineer was either incapacitated or killed in action, the assistant chief engineer was made chief engineer. () 
== List of assistant chief engineers ==
* Lieutenant Hess (2151)
* Lieutenant DeSalle (2267)
* Lieutenant Cleary (2270s)
* Jim Shimoda (2364)
* Lieutenant junior grade (2364)
* Ensign Clancy (2365)
Varro generational ship
* Derran Tal
* Lieutenant Joe Carey (2371-2378)
Unnamed Y-500 class freighter
* George Webb
Category:Titles
fr:Chef-ingénieur assistant
nl:Assistent hoofdingenieur