The Assistant Chief Engineer is responsible for assisting the chief engineer in the repair and maintenance of all ship's or station's systems. This includes pre-scheduled preventative maintenance, system upgrades and repairs to correct malfunctioning or damaged systems.
The Assistant Chief Engineer is a senior department position requiring a rank of Lieutenant or above, especially on large vessels.
Onboard the USS Invincible, there are four Assistant Chief Engineers:
- Lieutenant commander B'Elanna Torres,
- Lieutenant Commander Robin Lefler,
- Lieutenant Commander Reginald Barclay, and
- Lieutenant Commander Gen