A seat assembly is provided for supporting an occupant above a floor in a vehicle. The seat assembly includes a seat cushion extending between front and rear ends. The front end is adapted to be pivotally coupled to the floor for pivoting the seat cushion between a seating position and a kneeling position. A seat back is pivotally coupled to the rear end of the seat cushion and is adapted to be releasably secured to the floor. A drive link is pivotally coupled between the floor and the seat back. The drive link urges the seat back to pivot relative to the seat cushion as the seat cushion pivots between the seating and kneeling positions thereby maintaining the seat back in a generally vertical orientation.