Assistant chief engineer

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 prescheduled 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.

On Fleet Carrier or Heavy Battleship type vessels, the Assistant Chief Engineer is usually a Lieutenant Commander.