• Peer-reviewer international scientific journals on psychotherapy and mediation
  • Member of several Linkedin groups on Solution Focus, Positive Psychology, ADR/Mediation and Positive CBT
  • Advisor Huis voor Helden, www.huisvoorhelden.nl


  • Guest lecturer Universitas Padjadjaran (UNPAD), Bandung, Indonesia
  • Co-founder and chair of the Solution Focused Cognitive Behavioural Therapy Section< of the Dutch Association for Behaviour and Cognitive Therapy (VGCt)
  • Founder and chair of the Special Interest Group (SIG) Positive CBT, European Association of Behavioral and Cognitive therapies (EABCT)
  • Trainer and supervisor Dutch Association for Behavioural and Cognitive therapies (VGCt)
  • Supervisor KP (Clinical psychologists), GZ (Health psychologists) and NIP K&J (Child psychologists)
  • Mental Health Trainer of┬áDoctors without Borders Holland (MSF)
  • Member Solution Focused Network Holland (NOW)
  • Member several sections of Solutions in Organisations Link (SOL)


  • Member International Positive Psychology Association (IPPA)
  • Member Editoral Board of the Dutch Journal of Positive Psychology
  • Member Editorial Board of The Journal of Happiness and Well-Being
  • Member Dutch Positive Psychology Network (NPP)
  • Member European Network for Positive Psychology (ENPP)


  • International Full Certified ADR Mediator and Conflict Coach
  • Founding Member of┬áMediators Beyond Borders (MBB)
  • Co-founder and past chair Foundation for Professional Neighbor Mediation Amsterdam (SPBA)
  • Member Association of Mediators North-Holland, the Netherlands (VMNH)