Catherine Mehrtens started her career in the Paris headquarters of the insurance company AXA. There she helped guide the strategic internationalization of the HR department which included negotiating and advising on the ensuing career paths for AXA executives and expatriates.
Since 2012 Catherine has worked as a freelance negotiation consultant, coach and trainer, serving both the private and public sectors. Her primary focus is the support of international change projects and strategic negotiations, particularly in the banking and insurance business, as well as healthcare and IT.
Catherine is a German citizen and is fluent in German, English, and French.
Jan is an attorney, mediator and conflict management professional working for an international humanitarian organization. Jan is passionate about empowering people to constructively deal with differences and conflicts. He has delivered trainings in various parts of the world. Jan has complemented his practical experience in negotiation and conflict management with a range of professional trainings, including with the Program on Negotiation at Harvard Law School, the Centre for Effective Dispute Resolution (CEDR) and Trigon Entwicklungsberatung. He is a CEDR Accredited Mediator and a Certified Mediator according to the German Mediation Act.
Jan gained further experience in two reputable corporate law firms, a development agency, the Foreign Service, the judiciary and several NGOs. Jan joined Rational Games as Associate Trainer in 2018. He is fluent in German and English and also speaks French and Spanish.
Jan Friedrichs studied business administration with a particular focus on management and human resource development at the Hochschule für Wirtschaft near Hamburg and in Boston. After spending four years in international sales for a global consumer products company, and seven years in total in industry, in 2005 Jan founded his own company as an entrepreneur, trainer and consultant. He coaches, advises and trains middle and senior management and their teams, working for clients such as Airbus, HanseWerk und HELM.
Jan also teaches at the Leuphana Universität Lüneburg und the NORDAKADEMIE in Elmshorn. His company adventure learning (www.adventure-learning.de) offers innovative approaches to HR development for management and emerging leaders through original learning experiences training communication and leadership skills as well as personality development.
Jan is a German citizen and lives in Hamburg.
Joana has conducted trainings on topics such as negotiation, gender and culture in negotiations, conflict management, and emotional intelligence and has wide international experience. Through her work at Rational Games Inc she has had the opportunity to teach at several prestigious companies and government institutions such as the German Foreign Ministry, the BBC, Mercator Kollege, University of Zurich, Xing, EU International Communication Union, to name a few.
Besides Mediation and Advanced Negotiations trainings from the Harvard Program on Negotiations she holds an MBA from Reykjavik University, a Master in Humanitarian Action and Conflict from Uppsala University as well as a diploma in Protocol and Diplomacy from the International School of Diplomacy of Brussels. Furthermore, she has specialized in and Humanitarian Negotiations at the Clingendael Institute of International Relations of the Netherlands and is PhD candidate at the Twente University in Negotiations.
Joana is a Portuguese and Icelandic citizen and is fluent in Portuguese, Spanish, English and Icelandic.
Felix Miller is a Negotiation specialist with a focus on Entrepreneurship, Banking & Finance as well as Negotiation education, currently working at Deutsche Bank AG as Vice President Deal Expert.
During his career, Felix has created several ventures, worked in Startups & co-founded Deutsche Bank's Office for Negotiation, providing him ample opportunities to work in different contexts & cultures including Africa, the US, Asia & Europe. In 2018, he joined Rational Games Inc, as a Negotiation trainer & advisor to our clients, grantees & board members.
Felix is a Harvard-trained negotiator, holds a MSc. in International Business Negotiation from IÉSEG School of Management in Paris & a BA. in Business Administration from the Munich University of Applied Sciences. He speaks German (native), English, French & Italian.
Felix has a background in strategy consulting in the analytics space in the finance, banking, airline, and retail space. He currently leads a team of Data Scientists at Meta, where he supports the cross-functional development of new commerce products. Felix’ negotiation specialty is cross-functional collaboration and conflict resolution in large, interdependent organizational structures. He holds a bachelor degree in industrial engineering and a Master in Management from the École Supérieure de Commerce in Paris. Felix lives and works in London.
He is fluent in German, English and Spanish.
Sebastian Schaefer is a strategic consultant working primarily in the banking and financial services industry with a particular focus on marketing, pricing and negotiation. He also advises clients from the public and private sectors with regard to negotiation and communication skills as an Associate Consultant for the nonprofit training and coaching company Rational Games Inc.
Sebastian holds a degree in Industrial Engineering with majors in mechanical engineering and strategic management. He also studied International Business Negotiation at IÉSEG in Paris.
Sebastian is fluent in German and English, with a working knowledge of French.
Hami is a consultant specialized in negotiation training, alliance partnerships, and coachings for young professionals. He is an experienced entrepreneur and worked with strategic management consulting companies, such as Bain and BCG, to deliver primary research data for commercial due diligence projects. Hami currently leads an alliance partnership team of a French software company, which is part of the French Tech Association.
Hami holds a master's degree in International Business Negotiation from IÉSEG School of Management in Paris as well as a BA in Business Administration from Munich University of Applied Science. He speaks English, German, French, and Farsi.
Antonia is a negotiation consultant and trainer specializing in cross-cultural communication and international collaborations.
Throughout her career, Antonia has developed proficiency in adult education, sales, marketing, and strategic partnership development. She has negotiated sales contracts, managed stakeholder relations, and established multifaceted partnerships in both the private and public sectors.
Antonia holds an MSc in International Business Negotiation as well as a Key Account Management certification from IÉSEG School of Management in Paris. She also holds a BA in Modern Languages from the University of Lethbridge, Canada. She speaks English, Spanish, and French.
Julian is an associate trainer at Rational Games. With an academic background in international relations, diplomacy, and history, he guides and analyses negotiation simulations and supports RGI seminars as a technical co-host and in terms of logistics.
He holds a scholarship of the German Academic Scholarship Foundation, is a former Secretary General of the United Nations Youth Association of Germany, regularly supervises election committees as a voluntary electoral officer, and worked as a student assistant at the Institute for Constitutional, Social, and Economic History of the University of Bonn.
Julian is a German native-speaker and fluent in English, with an elementary knowledge of French.
Janne is an organizational psychologist with a focus on transformation and change management. He is passionate about enabling organizations, teams and leadership navigate uncertain conditions. Janne has several years of professional experience as a researcher and consultant in international organizations, such as the United Nations, the German Agency for International Cooperation (GIZ), and the Center for Social Innovation and Investment (CSI). He is currently working as a consultant in German development cooperation.
He holds a Master's degree in Psychology from the University of Heidelberg and the University of Vienna. He also obtained a Bachelor of Arts in Philosophy and Political Economy. With his PhD at the University of Heidelberg, Janne is currently further specializing in the topics of organizational decision making under uncertainty.
Janne is a German citizen and speaks German, English, French and Russian.
Philippe Gruca holds degrees in philosophy (Sorbonne, Paris) and sociology (EHESS, Paris), and today puts his skills to good use in various projects that put values into practice.
On the scientific level, he has co-directed the journal Entropia, addressing contemporary issues such as the anthropocene, transhumanism and degrowth. Philippe Gruca has specialized in the thought of the philosopher Günther Anders, contributing to numerous books and conferences on the ethics of responsibility, scale and technology. He is also a member of the Malaurie Institute of Arctic Research Monaco-UVSQ and edits the interdisciplinary journal Inter-Nord.
Philippe Gruca is also the founder of a school of rhetoric, the "Atelier Français", which combines linguistic, psychological, and intercultural dimensions. He teaches these disciplines to cultural and political figures in Paris, Berlin and Warsaw.
Together with the psychologist Oliver Vogelhuber, he helps people in crisis situations to initiate a real paradigm shift - which of course implies negotiation skills, with others but also within oneself. His hope is that, through the collaboration with Mark Young and Rational Games, these skills will find their way into the hands of people committed to the values of responsibility, sustainability and dignity.
Philippe Gruca speaks French, English, German and Polish.
As a professional actress, linguist, educator, and voice coach, Julia strives for conscious communication and cross-cultural dialogue. With ten years of expertise in adult education and her acting background, Julia developed her own Know-How in the field of public speaking and communication in a foreign language.
Stage fright, self-confidence, and female leadership are her favorite topics.
The first collaboration with Rational Games happened in 2011.
Since then Julia has been taking part in seminars on negotiation both as an actress and a coach. Sentences you could hear from her often:
"HOW is at least as important as WHAT" and "We are talking bodies, not talking heads"
Since October 2022 she is also working as a consultant for communication and multimedia at DER MITTELSTANDSVERBUND – ZGV e.V. (SME Groups Germany)
Holding a background in Chemical and Process Engineering, Alberto has built a diverse career across the chemical and energy sectors, working in roles ranging from back-office to front-office positions. In addition to his keen eye for photography, particularly for RGI, he holds a Master of Science in Chemical and Bioengineering. Alberto also has a strong interest in the fields of negotiation and communication.
His interactions are characterized by a genuine interest in connecting with people, learning their stories, and sharing moments of laughter.
Alberto is a native Italian speaker, fluent in English, intermediate skills in German and basic knowledge of French.
Living in Zurich area (Switzerland)
Ziad Holaihel is a Beirut-based Coach and Trainer with over 15 years of experience in management, consulting, and sales. Specializing in strategic growth, he has a proven track record of transforming start-ups, SMEs, and public sector organizations across the Middle East, Africa, and Eastern Europe. A Bachelor's degree in Industrial Engineering with a minor in Mathematics equips him with a strong analytical foundation.
Fluent in English, French, and Arabic, Ziad is a trilingual advisor who leverages his certifications in Design Thinking, Life Coaching, NLP, and Time Line Therapy to offer holistic business solutions.
His multidisciplinary approach focuses on team-building, operational excellence, and profit maximization.
Henk is a Lifestyle Gamification Coach, where he helps clients refine their gamification systems for improved productivity and success. He creates games that drive moving conversations leading to win-win outcomes. His professional background also includes positions as a Data Analyst & ISO 27001 Lead at Klir, Business Analyst & Project Manager at Universal Health Care, and various roles in IT consulting.
Henk holds an Honors B.Sc. in Computer/Information Technology Administration and Management from the University of the Free State, where he focused on areas including Strategic Management, Advanced Marketing Management, Internet Marketing, and Data Structures among others.
Henk speaks English and Afrikaans and lives in Cape Town South Africa