Field command
A field command was a Starfleet leadership position who operated out "in the field", as opposed to a clerk or bureaucrat who sat behind a desk.

In 2267, James T. Kirk was upset to learn that Commodore Stocker had replaced him as commanding officer of the  following Kirk's hyper-accelerated aging, as Stocker had never held a field command before. 

Though Spock attempted to explain that Stocker was the ranking officer aboard the ship, Kirk protested that the commodore was a "chairbound paper-pusher" and ordered Spock to relieve him. ()

See also 
 Field commander
 Field officer

Starfleet