Mark Tigchelaar

Mark Tigchelaar (1984) is a neuropsychologist, speaker, and bestselling author at the intersection of focus, stress, and brain performance. Based on scientific research, he developed a practical method to reduce distractions and strengthen concentration. To date, he has trained more than 100,000 professionals worldwide, from entrepreneurs and knowledge workers to top athletes. His book Focus On/Off became an international bestseller and forms the foundation of his lectures, in which he shows with energy and humor how to use your brain more effectively. His approach is concrete, evidence-based, and directly applicable in daily practice. Mark has given multiple TEDx Talks and is a highly sought-after speaker for organizations aiming to reduce workload, increase focus, and pursue sustainable performance. Smarter work with less distraction In his sessions, Mark reveals the four concentration leaks that undermine our attention. He shares hands-on techniques such as focus blocks, break strategies, and brain hacks that help redesign the workday. His lectures are energetic, sharp, and backed by neuropsychological research. Mark shows how to achieve more with less distraction, without working harder or exhausting yourself. Mark speaks at corporate events that focus on themes such as vitality, workload, mental resilience, productivity, leadership, and organizational development. His keynotes fit seamlessly with leadership days, team development sessions, HR conferences, and events centered around well-being, focus, and brain performance.