what do you call a past president who helps new president of organization?
I give up. What?
An outgoing president.
A lame duck president.
I'd call him altruistic and thank him heartily for his past experience and wisdom in showing me the ropes. In other words I'd call him my mentor.
Other people asked questions on similar topics, check out the answers they received:
Other people asked questions on various topics, and are still waiting for answer. Would be great if you can take a sec and answer them