Oh I’m not trying to diminish them, I actually think the administrative assistants and secretaries of the world do a million times more than the executives they support. Yeoman Rand probably does a ton of behind the scenes shit that keeps the ship running but on paper yeomen are assistants. They aren’t the decision makers even when they are assigned to a captain or XO. The decision maker would be the Command Master Chief. He works hand in hand with the command team and does a lot of administrative stuff too but he is more of a leader whereas a yeoman is more of a supporter. There are many quirks about the military like this so I don’t think it’s weird she’s on the bridge at all.