An operator cab mounted on a chassis of a mobile work vehicle. The cab comprised of a frame supporting a back panel, a pair of opposing side panels, and a roof panel, wherein the side panels and the roof panel each have a first edge proximate the back panel and a second edge opposite the first edge, the second edges defining a door opening. A door proximate the door opening, the door movable to a closed position or an open position and defining a front barrier when in the closed position. A roller assembly positioned proximate the roof panel and connected to the door, wherein the door is moved about the roller assembly to an open position from the closed position, allowing for an operator to ingress and egress through door opening.