O’Brien is a “chief,” Jonas and Cutler hold the rank of “Crewman,” and I think those are the only enlisted personnel who have lines and appear in more than one episode. Starfleet seems ridiculously officer heavy.
Is the enlisted/officer distinction different in Starfleet from traditional armed forces? And where are all the warrant officers?
A yeoman is a person who does administrative and clerical work in the modern Navy. They run the gamut from E-4 to E-9. That’s low enlisted rank to the highest. Rand could be an E-9 Master Chief Petty Officer Yeoman for all we know. That would make her the appropriate rank to be the captain’s administrative assistant.
Master Chief Yeoman Rand?
Edit: disclaimer, I used ai to generate this., also I apparently have fat thumbs today.
Just to say the way the role is presented kn television doesn’t highlight the sensitive roles such as being the senior NCO responsible for oversight of enlisted personnel performance evaluations or communications with command.
It would be very senior AO role on a capital ship, but she mainly comes by to get the captain to sign stuff.