I'm sorry to say that I can't find anything in my records that reminds me of the name or contact info of the guide that we used in Amsterdam, except I think his first name was "Geert." I'm pretty sure I posted a (glowing) review of our tour with him after we got home in October 2018 -- maybe on TripAdvisor -- so you might search for his name on that site. Sorry I can't give you more.
My wife and I and another couple will be in Amsterdam in September for a few days before leaving on an Avalon cruise. I'd like to visit some of the sites north of the city that relate to the Zuider Zee reclamation project, but I find that no organized group tours go to the sites I'd like to see. Has anyone had experience hiring a private car and driver for such a day trip out of Amsterdam? If so, I'd appreciate any recommendations. Thanks.