@Henoch You are correct Alden is the man!
CLUE #1
Jack of all trades, a multi-tasker --- assigned as communications officer, mans the helm (relieved Mitchell), away team member, helped in Nav. console repair console w/ Kelso for engineering, helped cannibalize the Delta-Vega Station for other console (203-R) then repairs with Scotty (It fits like a glove Captain)
CLUE #2
I am seen helping aboard ship and on planet side
CLUE #3
I'm a hands on person! I seem to know what I'm doing as I work with others.---again, working with the electronic devices, helps Keslo with wiring, helps Scotty with install of 203-R unit
CLUE #4
I wear a blue shirt
Clue #5
I'm a person of few words, but I do speak ---"Acknowledged, Mister Mitchell." "I think I've got the 203-R set, Lee"..."OK"
Clue #6
I work with one of our heroes directly, just us, one on one, but we don't have any dialogue between us.--again, Assists Scotty in install of the 203-R unit on the bridge, they don't speak.
Clue #7
I handle some pretty important cargo-- removes and carries the 203-R unit and transports with it
Clue #8
I'm a one and done and the performer went on to have a longer run on another tv show!
Lloyd Haynes, US Marine Corp. 1952-1964. As an actor had more success in teaching history as Pete Dixon on "Room 222"
Was also on other tv shows like Batman and The Green Hornet and died at the young age of 52 of lung cancer.
Henoch, you're up!