Craiglist is free to post on and they have a section food beverage and hospitality. Be open with what your looking for. And be precise. If your looking for a new exec you may want to talk to some current sous chefs in the area. In my experience most executive chefs tend to stay where they are but a high quality sous chef who is ready for the title shot is what you want. If i was hiring a new executive i would not hire a sous chef as well. I would hire your executive chef and he should either have someone in mind that he will bring along as sous or you should let him hire his own sous. The chef sous chef relatuonship can make or break a kitchen. It is always better to hire your executive and let him place his sous chef. In my opinion this is a better bet.