Buried Talent, by Philip E. High (epub/Kindle)
Hudson looked round the command room with its cramped balsa-plast desk, single chair and wall bunk. Command room! His mouth twisted, half with amusement, half contempt. All the years of struggling and devoted service, service which had broken up his home and driven his wife to seek comfort elsewhere. All that until, finally, they had given him a command. A command! Not one of the new powerful cruisers or even a fleet of space tugs but a detector post on Ganymede. A hive-shaped dome on an airless satellite with four men and a sergeant to keep him company.
He had given up telling himself that the posting was important. He knew it wasn’t...