There are probably a number of different grades/titles of sergeant mentioned in Star Trek -- one exists that i know of, as a first sergeant was featured in Star Trek IV: The Voyage Home.

I have no screencaps of his first sergeant insignia, which an IP user, on Talk:First sergeant, has pointed out could vary from the version shown, since different grades of non-commissioned officers can hold the position of first sergeant.

Also , I have a suspicion more sergeant rank insignia might've been seen onscreen:

Air Police sgtEdit

Ok, I'm certain that the Air Police Sergeant was a US Air Force Staff Sergeant (Paygrade of E5), which makes him equivalent in rank to an Army or Marines sergeant (paygrade of E5) or a US Navy/US Coast Guard Petty Officer 2nd Class (E5 paygrade, also).

I had noticed he was above sergeant too, but from the caps I had i couldn't tell if he was "tech sergeant" or "staff sergeant" -- now we have a new article to make. -- Captain Mike K. Barteltalk 23:50, 12 Jan 2006 (UTC)