Sjaak’s energy and integrity are his key characteristics. He is very good in establishing a learning environment in which people feel safe to develop themselves and learn from each other. He has great flexibility in switching from cognitive to empathic and energetic styles, both as a trainer and coach. Being a therapist as well, he understands and respects the boundaries between training, coaching and therapy. He is a 
master trainer in the Positive Power and Influence Training (trainings in Moscow, Europe, India) and the EQMap (trainings in the U.S. and U.K.). He speaks fluent English and Dutch, has a good command of German, moderate in French and basic in Italian.
- Facilitated many business teams around trust, personal issues, goal setting and renewing energy
- Coached many managers from top 25 Dutch organizations on career development, politics in business environments, influence styles and people management.
- Developed and customized trainings around influence skills, ‘politics’ in business environments, creativity and emotional intelligence
- Published three books on communication skills and emotional intelligence and scientific articles (in Dutch) on a five year survey of the positive effects of his training on Emotional Intelligence
- Customized and delivered communication skills training to culturally diverse audiences in banking, building industry, government
- Offers several open entry trainings from his own company on leadership, communication and revitalization