Drs van Rooijen is a dermatologist specialized in oncology, surgery and human anatomy at the Spaarne Gasthuis in Haarlem, the Netherlands. Still working as a dissector and teacher for the neuroscience and anatomy department at the Erasmus MC university hospital in Rotterdam, and organizing anatomy and reconstructive surgery courses on their skillslab. Currently also a board member of the Dutch micrographic surgery taskforce and board member of the Dutch dermatologic surgery and lasers domain group.