He is currently the Stephen B. Kay Family Professor of Public Health and the chair of the Department of Epidemiology at the Harvard T.H.
He went on to complete a second research fellowship within the department of epidemiology at the Harvard School of Public Health in Boston, Massachusetts, in 1982.
In 1988 he became chairman of the department of epidemiology, Erasmus Medical Center, Rotterdam, Netherlands, in which he served until 2016.
This has made the findings in these studies generally useful for public health purposes, as well as for clinical medicine.
The Rotterdam Study was one of the five founding cohorts of the very productive CHARGE consortium which has performed many successful genome-wide association studies that have found a large number of genes associated with common diseases.