Jan Heeringa (MD) received his medical degree from the University of Groningen (1976). Since 1978 he is working as a general practitioner in "Gezondheidscentrum Ommoord." This health centre with several general practitioners, physiotherapists, practice nurses, district nurses and social workers provides primary care for more than 15000 inhabitants of Ommoord, a suburb of Rotterdam.
He has been involved in the Rotterdam Study from the beginning in 1989 as one of the participating general practitioners. In 2003 he was appointed coordinator of the Rotterdam Study. Besides this he is still working as a general practitioner.