J. Yezback

J. Yezback was a Mars security guard stationed at Mars City. You can find him in the main office entrance guarding the door to the ACO Access Junction. If the player approaches him, he will say, "Listen buddy, you don't have clearance for this area. Move along."

If the player persists in speaking to him, he becomes very annoyed and snaps, "God damn it, marine, get out of here!"

During Hell's invasion, he likely becomes a machine gun Z-Sec or zombie or is killed.