Brannigan is a senior in the Plumbers' Academy. He is the leader and commander of the unbeaten Alpha Squad. They are a group of senior Plumbers who takes a dummy on hostage for junior Plumbers to learn how to rescue someone from hostage situation. He had a grudge against Ben, but soon become friends by the end of the episode.
Ben 10: Ultimate Alien
- Basic Training (first appearance)
His name is a reference of the surname of Zapp Brannigan, a character of Futurama.