- For the location in The Last Stand Dead Zone, see Security (Location).
- Not to be confused with the Union City Police Department.
After the outbreak began, one of their members, Richards, ran off with the key to their Gun Cage. Defenseless, the other members barricaded themselves in their building and turned it into a safehouse. Until the key is recovered, they are unable to leave and scavenge for supplies, or make their way to the Stadium evacuation point.
- First floor hallway contains an NPC, Tyrel Johnson.
- Study room to the right contains a Police Baton, a Businessman skillbook, cash, and a lot of junk.
- Hallway to the left contains a Nightwatchmen skillbook.
- Second floor hallway contains a footlocker with some 9mm and .45 ammo, a Batter Up! skillbook, and some clothing.
- Second floor office contains two NPCs, Keith McNulty and Todd Stephens.
- The gun cage to the right contains 2 G17 Pistols, a Death Adder .45, a Scoped Hunter Compact, an MP5, a Custom Stock Shotgun, and some ammo.
- Interestingly, even after the key is retrieved and the gun cage is unlocked, the Union Security officers are not shown leaving the building and heading to the Stadium, like they originally planned.
- There is an inaccessible garage door to the right of the entrance. It most likely stores the company's vehicles.