A modular standing frame (10) is described herein. The modular standing frame has a chair module (12) that is movable between a seated condition for supporting a user in a seated position, and a standing condition for supporting a user in a standing position. The chair module includes a seat (26) and a seat back (28). A linkage assembly is connected to the seat back to substantially maintain the seat back in a predetermined position as the chair module moves from the seated condition to the standing position. At least one bracket is connected to the seat back. A work surface (110) is connected to the at least one bracket to enable movement of the work surface from a lowered condition to a raised condition with corresponding movement of the chair module from the seated position to the standing position. The work surface extends in front of the seat back across at least substantially an entire width of the seat back.