Captain's Yeoman

Command Division Uniform
The Captain's Yeoman is a position in Starfleet associated with administrative and clerical duties. Yeomen may be of any rank, including officers, and be a member of any division - though commonly they are considered members of the command division and are an enlisted officer.

The Captain's Yeoman primarily assists the ship's Commanding Officer in the administrative work associated with his posting, often dealing with high numbers of reports, and requiring the skill and knowledge to be able to prioritise what the Captain sees first, and what needs the Captain's direct attention. They hold no official authority over other members of the ship's crew beyond their rank, but orders passed through a yeoman are considered to be as if from the Captain's mouth him/herself.