When the outbreak began Tobaias was in the storeroom in the libary attic and therefore survived a zombie swarm that swpt through the building as a result of a failed containment plan similar to the one in Atlanta. He survived for six months in the libary attic before taking a chance at leaving the city.
He met up with his two traveling companions outside new Jersey and the trio decided to stick together to improve their ods of survival in the new world.
Tobias is a practical indavidual who tends to take everything in stride. Has such he has managed to adapt quite well to the Apocalypse ; useing a level head to work out problems in a crisis.