He will appears the office, Not Camera, SO Dont using cameras. Here what you do to be attacked by him.

when you see him no yellow eyes, use flashlight to right .

if you see him yellow eyes, use flashlight to left hallway.

when you see him in left down, use vent 2 to make him leave.

when you see him up left, use vent 1 to make him leave.

Hope this help, If you have problem, let me know in comment