Vincent FREY is an associate consultant professor of leadership and negotiation. It works with students in diploma training and mainly in companies in tailor-made training. It develops specific training programs to support active managers and executives. Before teaching, he spent many years in business where he handled the negotiation of "key accounts", the animation of sales teams and more generally a commercial framework with more than 3,500 appointments with customers "B to B”. He is an adviser to the United Nations NM in New York and Washington. It designs and publishes educational case studies.