TOOLKIT COMPANY - Key Persons


Dimitra K. Triantafyllou

Job Titles:
  • Owner
Dimitra K. Triantafyllou (Ms) (owner [since 1996] of ‘ Dimitra K. Triantafyllou Law Office' in Thessaloniki, GR) is a practicing lawyer in Greece in the field of corporate, business and commercial law, (Bachelor in Law at Aristotle University of Thessaloniki, GR), specialized in South Eastern European Region (LL.M at Democritus University of Thrace, GR). She is also specialized in the ADR, conflict and crisis management & prevention field, holds a diploma on Decision Making, Crisis Management & Negotiation (University of Macedonia, GR), is an IMI certified mediator and mediation advocate, an accredited civil & commercial mediator (with ADRgroup, UK and Toolkit Company, NL) and Family mediator (with ADRgroup, UK), is a ACB Credentialed Mediator (NL), has done further training on Mediation and Dispute Resolution Systems Design (Harvard's Law School training on Mediation, UC Hastings Summer Institute on Court ADR and Straus Institute for Dispute Resolution at Pepperdine University School of Law, USA), business mediation training (ISBM, AT), is an accredited advanced mediation trainer (Toolkit Company, NL), is a trained Negotiator (Harvard's Law School trainings, on Basic and Advanced Negotiation and on Negotiation for Senior Executives, USA), is a trained International Commercial Arbitrator (The CIArb North American Branch) and is trained on "Conflict diagnosis and intervention techniques" (SSR, NL) and on "Neuroscience and Mediation" (Scientific and Methodological Center of Mediation and Law, RU).

Huub Liefhebber

Job Titles:
  • Founding Partners

Manon Schonewille

Job Titles:
  • International Trainer
Manon Schonewille is a fulltime professional in mediation, a certified business mediator, IMI certified mediator and IMI certified mediation advisor. She is co-founder of Mundi Mediatores and The ACADEMY of Legal Mediation and Negotiation. Manon mainly mediates employment cases and commercial issues where corporations, joint ventures, international teams or commercial collaborations in the business to business service sector are involved. Before becoming a full-time ADR professional Manon worked in international marketing and business strategy in several countries for multinational organizations including Nestlé and Schering. Here the foundation was laid for her interest in international negotiation and conflict management. She graduated from the law faculty of Groningen University in the Netherlands and completed the Negotiation and Advanced Negotiation courses as part of the Program of Instruction for Lawyers at Harvard Law School (USA). At the National Conflict Resolution Center (NCRC) in San Diego (USA), she gained practical mediation experience in the USA and she was also educated in The Netherlands, Austria and the UK. Manon has carried out trainings and consulting throughout Europe, the MEDA region, Caribe and the USA. She consults governmental organizations, corporations and leading law firms in dispute prevention, conflict management, mediation advocacy and setting up ADR mechanisms and programs. Moreover she trains professionals all over the world in the advanced use of mediation, negotiation and influencing techniques, especially in intercultural environments, as well as in training other trainers. Besides being a Board Memeber of IMI, The International Mediation Institute, and chairing IMI's Task Force on Mediation Advocacy, Manon participated in Hamline University's multi-year effort to critique contemporary negotiation pedagogy and to create new training programs for a second generation of global negotiation education. She taught and developed the business mediation, mediation advocacy and conflict management course at Utrecht University. Manon Schonewille is recommended as mediator and selected for the 2014-2020 editions of Who's Who Legal in Mediation. She is one of 298 worldwide selected experts in the field and as such a leading expert in The Netherlands. She is also selected for the Global Mediation Panel of the UN Ombudsman office to mediate disputes for five UN organisations (UNDP, UNFPA, UNICEF, UNOPS, and UN-Women). Manon Schonewille is frequently invited to speak at conferences and she publishes regularly. Several standard reference works and articles on mediation, deal facilitation and negotiation are written by her, including Toolkit Generating Outcomes and Toolkit Mediation Advocacy, The Variegated Landscape of Mediation (editor).

Peter Kamminga

Job Titles:
  • Co - Chair of the Committee
Peter Kamminga, Ph.D., LL.M. is an expert in negotiating, contracting and mediating complex legal matters. He closely collaborates with one of the US preeminent (JAMS) mediators, Judge Weinstein (Ret.) and the Weinstein Team and has successfully (co)mediated dozens of complex, multi-party civil disputes ranging from financial disputes, to insurance coverage cases and contractual matters related to construction, large development, and oil & gas projects, each with aggregate values of millions of dollars. As legal academic he is Affiliated Faculty at Harvard Law School Program on Negotiation and Associate Professor at VU Amsterdam University where he researches and teaches in the areas of contracts and negotiation. Peter Kamminga briefly practiced law as in-house counsel and as legal advisor at de Brauw Blackstone Westbroek (one of the Netherlands' leading law firms) advising on arbitration cases and large complex disputes. He then embarked upon an academic career but always kept a strong foot in practice working on various matters for clients such as the European Commission, The Dutch Ministry of Justice, and Ministry of Infrastructure, various Dutch and US insurance companies, international financial institutions, and various clients and contractors in the European and US construction industry. In 2011 he received a Veni-grant for his academic work, a prestigious grant awarded by the Netherlands Organisation for Scientific Research (NWO) to excellent, innovative, adventurous, and pioneering scholars, to carry out studies into optimal contract regimes and procurement methods. The same year he was awarded a Weinstein Fellowship from the JAMS Foundation for his accomplishments in the field of ADR practice. Kamminga is also Co-chair of the Committee on the Future of ADR of the International committee of the American Bar Association Section on Dispute Resolution. He has given presentations on his research findings at conferences around the world. Kamminga studied law at Groningen University, (Netherlands) Georg August University, (Germany) and Columbia University (US) and followed a Master degree program in Conflict Management at Maastricht University (NL). His Ph.D. written while in residence at Stanford University, was nominated cum laude and successfully defended at both Tilburg University (NL) and Brussels University (Belgium). He holds academic affiliations at UC Hastings College of the Law and Stanford University (Gould Center). He can be contacted at: y.p.kamminga@vu.nl; peter@kammingamediation.com or peter@peterkamminga.com.