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Valentin Ade

Valentin Ade teaches negotiation for instance the Universities of St. Gallen and Konstanz. Also, he leads trainings for various public and private clients. Before dedicating his career to negotiations, Valentin has worked for several years in international project finance and business development in the solar energy industry. He is particularly interested in negotiation mindsets and performs research as a part-time research fellow at Kalaidos University of Applied Sciences, Switzerland. His publications can be found here.

Valentin holds a PhD in Psychology from Leuphana University of Lüneburg. Also, he received a joint MSc in Management / Diploma in Business from ESCP Europe (Paris) and Technical University of Berlin, and a BA in International Affairs from the University of St. Gallen.  

He is fluent in German and English. Valentin is the founder of The Negotiation Studio.




Jörn Basel

Jörn Basel studied psychology in Konstanz, Toronto and Heidelberg specializing in the fields of organizational, cognitive and social psychology. Between 2008 and 2011 he worked as a research assistant for the chair of management control at the ESCP Europe Business School Berlin and was a visiting scholar at the University of Florida. In 2012 he finished his dissertation on heuristic reasoning in management accounting obtaining the degree of “Dr. rer. pol.”

Since December 2012 he is an investigator with Kalaidos Research and professor of business psychology at Kalaidos University of Applied Sciences based in Zürich and involved in various research and consulting projects. His fields of expertise are applied decision making with a focus of trust and risk. For some recent publications see this link.

He is fluent in German and English.



Marie-Lena Frech

Marie-Lena Frech writes her doctoral thesis at the Chair for Management and Organization (IMO) at Leuphana University of Lüneburg. Marie’s research revolves around individuals behavior and decision-making in negotiations. Specifically, she is interested in first offers, anchoring effects, anchor precision effects and pricing decisions. Marie hold several negotiation seminars and workshops at the Leuphana University Lüneburg and the University of Konstanz.

Marie holds a B.Sc. degree in Psychlogy and a M.Sc. degree in Work, Organizational and Economic Psychology (University of Vienna, Austria). She was a visiting scholar at University of California, Berkeley and Stanford University.

She is fluent in German and English.




Joachim Gassert

Joachim Gassert works in the field of coaching of future (specialist) personnel and, in this context, regularly promotes negotiation processes with various collaboration partners. His academic focus is on organizational psychology and decision sciences. Joachim is particularly interested in the creative process of adding value that comes with a collaborative negotiation mindset.

Joachim received his Master of Science and Bachelor of Science in Psychology from the University of Konstanz.

He is fluent in German and English.

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Theresa Goecke

Theresa Goecke (M.Sc.) is currently working at the University of Konstanz (Chair for Organizational Studies) as a lecturer and associate researcher. She is writing her doctoral thesis about the demographic change in organizations. Her research interests include aging in the workplace and team-diversity. Furthermore, she focuses on human resource management strategies in the context of Mergers & Acquisitions / Post-merger Integration. She is interested in stress-management and self-leadership topics as well as work-life balance strategies.

Theresa holds several seminars and workshops at the University of Konstanz, the Zeppelin University (Friedrichshafen), the St. Gallen University and the Salem Kolleg (Überlingen). Her experiences comprise two years at the SAP SE in the role of mediator for global leadership and culture workshops.

Theresa Goecke holds a Bachelor of Science in Psychology and a Master of Science in Organizational Behavior and Adaptive Cognition (Psychology) from the University of Heidelberg.

Theresa is fluent in German and English.



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Fieke Harinck

Fieke Harinck has been working in the department of Social and Organizational Psychology of the University of Leiden (the Netherlands) since 2001. Besides research and teaching in the academic field, she also teaches and trains social skills and negotiation skills in a wide variety of organizations such as the Leiden University Medical Center and the Center for Conflict in Haarlem (the Netherlands). She is interested (scientifically and practically) in many topics, among which negotiation, conflict management, mediation, interpersonal processes, presentation skills, and theatrical improvisation.

Fieke Harinck has a Master degree in Social Psychology from the Free University in Amsterdam (1996) , and a PhD in Work and Organizational Psychology from the University of Amsterdam (2001).

She is fluent in English and Dutch.



Felix Koch

Felix Koch is Head of Business Development at The Negotiation Studio. He studies psychology at the University of Konstanz. His interest in (political) negotiations started with taking part in simulations of the UN. Now he is eager to learn more about the mechanisms of human interaction.

Felix is fluent in German and English.


Aimee Lace

Aimee Lace is currently pursuing a PhD in Social-Organizational Psychology at Teachers College, Columbia University.  She is passionate about the intersection of psychology and international relations, and her research interests incorporate conflict resolution, network science, and teams.  Prior to her studies at Columbia, Aimee served as a consultant for the United Nations Institute for Training and Research in Geneva, and she continues to work with international organizations, NGOs and the private sector on projects related to conflict resolution, leadership, and team dynamics.  


Johann Majer

Johann Majer is a PostDoc at the Department of Social and Organizational Psychology at Leuphana University. He is interested in how cooperation between negotiation parties can be fostered to find sustainable solutions (e.g. in collective bargaining, urban planning, or climate change negotiations). In this respect, he examines the impact of work experience, framing, or the use of unethical bargaining tactics on entire negotiation processes.

Johann holds a Diploma in Psychology from the University of Trier, received his PhD from Leuphana University, and was a visiting scholar at Columbia Business School.

Johann is fluent in German and English. 



Noémi Nagy

Noémi Nagy is a work and organizational psychologist (PhD), with a background in social and economic psychology, media studies and criminology (MSc). As a certified university teacher with broad teaching experience in the areas of leadership, career development, personnel assessment, developmental psychology and work and organizational psychology, she has been teaching at the University of Bern, the University of Marburg, as well as the Distance University Switzerland. Noémi has received the career fellowship for promising young scientists from the Swiss National Science foundation (2016) and has been conducting research at University of Florida’s Warrington Business School (on proactivity at work), at the Kalaidos University of Applied Sciences (on negotiations with special focus on gender and negotiations, subjective ageing and career development), the University of Bern (on career development over the lifespan), the University of Applied Sciences Northwestern Switzerland (on interprofessional collaboration and cooperation) as well as the ETH Zurich (on assessment center and leadership assessments).

She is particularly interested in the influence of gender stereotypes and mindsets in negotiations and in social psychological foundations of negotiation behavior.

She is fluent in German, English and Hungarian.

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Carolin Schuster

Carolin Schuster is Junior Professor of Applied Social Psychology at Leuphana University Lüneburg. Her main research interests are concerned with the role of personal and social identity in negotiations and other challenging situations. For example, she examines typical experiences and behaviors in negotiations in value conflicts. She is also interested in how women and men are perceived in organizational contexts and how gender affects negotiation behaviors and outcomes. To foster integrative negotiating even under difficult circumstances, she explores the role of mindsets.

Carolin graduated in Psychology at the LMU Munich and received her PhD from the University of Konstanz. She is accredited as a Systemic Coach and Counselor by the German Federal Association Coaching (DBVC).

She is fluent in German, English, and Spanish.




Roman Trötschel

Roman Trötschel is a full professor of Social and Organizational Psychology at the Leuphana University of Lüneburg. His research focuses on psychological processes in negotiations (e.g., group processes, cognitive frames, self-regulation) as well as the impact of the social context on negotiations (e.g., negotiations on commons; collective bargaining with group representatives). An additional focus of his work is the area of conflict intervention (mediation and arbitration).

Roman received his PhD and diploma in psychology from the University of Konstanz, and has been a postdoc at New York University.

He is fluent in English and German. 




Marco Warsitzka

Marco Warsitzka writes his doctoral thesis at the Chair for Social-, Organizational and Political Psychology at Leuphana University of Lüneburg about negotiations. From January to March 2019 he completed a research stay at the Free University of Amsterdam in the Department of Organizantional Behavior. He also works as a freelancer for a management consultancy with a main focus on trainings (e.g. leading application-interviews, managing conflicts) and as a lecturer for negotiations (e.g., Leuphana University of Lüneburg, TU Berlin, RU Bochum). He is especially interested in identifying and overcoming obstacles for win-win solutions and complexity in negotiations.

Marco holds a B.Sc. and a M.A degree in Business Psychology (Leuphana University of Lüneburg, Hochschule Fresenius).

He is fluent in German and English.