A support mechanism for a vehicle seating assembly includes a seat frame moveable between a sitting position and a standing position and a support bracket coupled to a vehicle floor. A linkage assembly extends between the support bracket and the seat frame. The linkage assembly is positionable between a collapsed position if the seat frame is in the sitting position and an extended position if the seat frame is in the standing position and includes a first end rotatably coupled to the support bracket and a second end slidably coupled to the seat frame. A pawl assembly is engageable with the linkage assembly and positionable in an unlocked position if the linkage assembly is in the collapsed position and a locked position if the linkage assembly is in the extended position.