When I retired, I did some part-time consulting work for a client. As mentioned, it is hard to do "part time" I/T work. In my case, it was helping on I/T architecture design, so that made it possible given the design due date.
Later, even that was more than I wanted to do in my old world - and I did not want to go back to full time I/T work (I was offered a job by the company I was doing consulting work for). Instead, I got a gig teaching (one class) as an adjunct computer science (programming) at a local college. That's nice because it is truly part time (but see below) and you are free to not teach summers, etc.
Having said that, I went from one class sections to two, to three, and then to full time temp, and then full time (now tenured). While the money is a LOT less than I made in the mega-corp world, it is a much more fun j*b. But watch out, it is easy to get sucked back in.
I'm thinking this is my last year. I am doing it (the OMY coming in the fall) due to a DB pension (small, but for the rest of my life). I still like teaching but also want to have more time to do the things I want (and not just summer's / between semesters off).
p.s. One of the things I've liked about teaching is that I've had the opportunity to teach a variety of things and it has been fun skill wise. (Even though I don't ever intend to use them in the corporate world).
