At this time, no one has mentioned a starting sum, but not sure if I'd be interested in any case...
Unless you really need the money or are simply incapable of relaxing, do not line up a post-retirement job to begin shortly after you retire. Take that three- or six-month vacation you’ve been promising yourself for the past twenty years. The world of work will still be here when you decide you’re ready to come back to it — assuming you do decide to come back to it.