Karel Maas is a seasoned professional with extensive experience in nursing, training, and coaching within various healthcare settings. Currently serving as a guest lecturer at Hogeschool van Amsterdam and as a trainer for 113 Zelfmoordpreventie, Karel specializes in suicide prevention and tailored training programs aimed at reducing tension in groups. With a strong background in nursing, including roles at Cordaan and Van der Hoeven Kliniek, Karel has developed and implemented numerous training initiatives focused on de-escalation, aggression management, and specialized educational programs for diverse populations. Karel holds multiple qualifications in nursing and training methodologies, including a degree from the Hogere beroepsopleiding voor verpleegkundige and specialized training in aggression intervention and Aikido.