It depends. If he is on the up and up and is only brokering licensed trades it might be a good thing ... if he is a good salesman.
At a certain point everyone needs a rainmaker from time to time to go out there and drum up some business.
If this guy is willing to sell the job, deal with the customer and be sure to get the check he may be valuable to all of you.
Maybe I am just too optimistic
If I am wrong you can always drop a dime on him.
