“An extremely friendly trainer, who listened well and really answered questions. Innovative insights and clear tips.”

“Mark is a fantastic speaker. We hire him every year. Each time it’s a new story, tailored to what’s going on at the time.”

“Mark Tigchelaar is the younger version of Erik Scherder. Enthusiastic, a lot of knowledge about the brain and knows how to convey this to the participants in a fun way.”