ADN Group
Complex Negociation
level 4


The Professional Masterclass is the last step of the training process. It can be applied for only if the participant has completed the Expert course. The participants have to carry out some of hardest negotiations which will allow them to cover the following notions: the capacity to thwart threats, ultimatums and insults, advanced strategies, negotiation under pressure, decision-making when faced with the impossible, the necessity of continuing after a failure, self-confidence in deteriorating situations and advanced techniques to induce change in the opposing party. The Masterclass alternates subtly between theoretical approaches, and operational exercises.


The Masterclass is has been created for any person who must negotiate at in their work or in their specialized field, regardless of their level.


Has attended the ADN Essentials, ADN Advanced, and ADN Expert Complex Negotiation masterclasses.


day 1
day 2
In-person or remote
2 days / 14 hours
3 050€ / person
of people recommend the course
of people are certified

The masterclass is hosted by Marwan Mery at our Paris headquarters.

Marwan Mery is a professional negotiator. He works, daily, with businesses, government organisations and NGOs to help resolve their complex situations, including critical cases (kidnapping and ransom, extortion, suicidal persons...), commercial high-stakes negotiations, major social conflicts, diplomatic relations, and even therapeutic consultations where patients refuse to take their medication. Consultant at the United Nations and guest speaker at Harvard University on the subject of complex negotiations, he is the author of several successful books. He also manages ADN Group, an agency of professional negotiator made up of thirty experts located in France and abroad. Marwan is a former officer® specializing in influence and crisis negotiation within the COS, the French special operations command.

Learn more


  • Neutralise threats and ultimatums
  • Resist pressure
  • Counter manipulation and lies
  • Deal with the refusal to negotiate
  • Resolve impossible choices


  • An online questionnaire including situational exercises: NSTAA©, duration: 1 hour
  • A complete debriefing of practical cases and situations during the training course

Certified Qualiopi

ADN Group is a training organization that has obtained Qualiopi certification under the Training Action category.