For this position, you will need a very sturdy chair which has no arms and ideally, a high back. Climbing on can be a bit tricky for the receiver depending on leg length as compared to the height of the chair, but once astride, receiver can control the fucking holding onto the back of the chair over the giver's shoulders and kind of slide back and forth. Good position for beginners without much experience, as the receiver does the work. High intimacy (face to face) and easily accessible cock by either party.
Reverse Chairman is possible as well, and offers a bit of balance with the receiver's feet on the floor.