Usually geeky guys with high end electronic education or extreme mechanical/electronic repair / troubleshooting abilities. These guys are the gods of the casino world. Without them nothing would work. They're usually under paid and overworked. Most enjoy drinking alcoholic beverages agressively and have a strong appetite for coctail Waitresses or hot bartenders.
"Whos the hot guy in the black smock?" "He's the new Slot Tech, I wonder if he's single"
Bartender-"Oh boy, here come the Slot Techs...do we have enough beer this time?"