Studied art history, archaeology and prehistory at Groningen and Amsterdam University and worked on various excavations in the Netherlands and in Italy. Worked with an archaeological service on sites in the north of the Netherlands 2001-2003, self-employed archaeological consultant since 2003. Joined the present expedition in 2000 and introduced modern surveying techniques involving computer-aided design. Is responsible for making the plans, sections, and reconstructions. He left the mission in 2009.