Mark was an EOD specialist in the 33 Engineer Regiment of the Royal Engineers until he turned 26, He was honorably discharged after serving for 7 years. When he went back home he became a private contractor working in security on board Cargo ships. He worked with mostly Eastern European and Russian cargo companies and was docked in Chernogorsk when the city got overrun by infected. Mark and 3 of his co-workers got left behind and fled West towards the only Airport he knew only to be turned around at a Military CP west of Kamenka. He headed up North to try and find another way out and managed to find a rifle and a small bag which was left open with some food that was laid as a trap, 2 of his co-workers got shot in the head and the other shot in the leg, Mark managed to help his other co-worker leave the area and ever since Mark has been extremely wary of any people he comes across.