From my understanding, in any kind of security or law enforcement, the individuals who goe into those kinds occupation, do it because they are naturally imbued with the experience, talent and ability to deal with high levels of aggression and violence.
Bouncers, bodyguards, corrections officers, police, SWAT... you'll find lots of STJ and STP types in there, who have grown up, or purposefully adapted and learnt to deal with violence and aggression. It's like someone said- street smarts, experience and temperament is what counts, so I'm highly confused by this behavioural science degree thingy.
Maybe they are trying to take off the negative image associated with these careers by making it seem like you need to be "educated" to get the job?
[MENTION=2578]K-gal[/MENTION]; Corrections officers aren't all bad. There is a book Meditations on Violence by Rory Miller who is a well renowned expert in the field. It's a good book.