He has performed more than 500 organ harvesting procedures in more than six European countries. Through national and international courses, he has taught the surgical technique of abdominal organ donation to more than 100 people. In his ward, he has trained more than 10 surgeons in organ procurement and transplantation, two of whom have become completely independent procurement and transplant surgeons. He has been running popular national yearly courses in The Netherlands since 2000. The European Donor Surgery Masterclass (EDSM) together with ESOT remains very popular with Surgeons and Surgical Fellows. Each time, the demand to register is three times higher than available places.