Soldato
Well... I would have thought the DPA would cover what you told him in a professional capacity?
My advice on the job front is find a new job. Not because this guy is coming to work at your pace, frankly that's an irrelevance, but if you were willing to consider other roles and moan about your current one, you could be doing something better. Spend time finding that job rather than worrying about the one you don't like. See this as a kick up the backside to get busy finding something better.
1. say nothing
2. deny everything
3. smile and show newbie the ropes
4. once trust is gained you take the rustiest hatchet you can find and bury it square between his shoulder blades. i.e look to do him over on a professional level. This part takes skill otherwise it can backfire really badly on you. Subtlety is the key here.
5. Profit.........................
This is how you get to be MD.
So you recommend not communicating with him until he starts with us?
he has now won round one of Hatchet wars. You have exposed your weakness and fear of him blurting something out, this will be used against you. Maybe not now, but definitely later when he needs a strategic tactical advantage at the bargaining table.
Hope you have started looking for another job mate.