Sometimes MSA include a non-poaching/non-hiring clause which means you'll get a "thanks but no thanks" letter from HR. Your employer will not be contacted in this case.Otherwise, as long as you are making the first step, it should be OK.Expect that references will be checked extensively if the relationship between the two companies is good, and you may not be informed about it since it may well be an informal process! This generally won't happen until the MC has made you an offer (nobody likes to screw people up for the sake of it), but you cannot control the result or even who they will talk to.Unless you have no enemies where you are, be careful and explain your position/relationships once things seem to be set towards getting an offer.