I do not have any similar experiences to the one you provided, but I can definitely say that it is an interesting one. The situation does in fact violate the NDA or CDA for multiple reasons. The consultant is outwardly exposing the tools that his previous company used for their documents. This entire situation has to do with copyright and revealing the way another company does business. I am sure if that company found out what he was doing, a law suit could have easily been started. It would be beneficial for companies to work with attorneys who can take action against those who do not appropriately follow written agreements. The fact that your manager was able to realize the violation and took action to avoid any possible legal action, he showed his complete understandings of the binding agreements. I really hope the consultant is not doing this with every company that he is going to!