Barracuda is an agent with U.N. Intelligence.
That is, obviously, not the agent's real name but since we never learn any other moniker, including whatever one he was born with, it is the best we can do. Even his closest friends call him Barracuda, which is also his codename, so he is not likely to be offended if we use it. Speaking of names, it is quite common to see his adventures described as being that of "Codename: Barracuda".
I put his department as being "Intelligence" but really he works for the United Nations in general. I narrowed it down because his missions are that of a generalized troubleshooter but more often directed against very bad people or organizations and someone has to be making those distinctions, hence putting him in a department.
Barracuda does not routinely work alone. He has as his partner a bald headed freakishly strong bruiser named Frollo (no last name known). While Barracuda is essentially the senior partner, their closeness and friendship puts them on equal footing. Since they have worked for quite a while before we meet them in their first recorded adventure, that cohesiveness is already firmly established.
Though there could be any number of bad guys to warrant calling in a pair like Barracuda and Frollo, the principle nasty organization to take up a good deal of their efforts is War Against Mankind, or WAM. That name really shows how evil the group is because their goal is really to wipe out civilization as we know it. Luckily for us, Barracuda and Frollo prove over and over just how good they are.
Also playing a major role as nemesis to the pair is King Cobra, a genius who also possess superhuman strength and a wicked imagination and a fantastic mastery of disguises, one time even taking the place of a Presidential candidate and winning! Luckily, Barracuda was able to prove the deception and save the day.