Jan Gerritse is a highly experienced scientist and project leader at Deltares since 2008, with expertise in microbiology and biological safety. Former roles include project management and research positions at TNO Built Environment and Geosciences, TNO, and Wageningen University from 1997 to 2009, as well as post-doctoral fellow at the University of Groningen from 1993 to 2001. Jan Gerritse has a Doctorate in Biology from the University of Groningen, obtained from 1982 to 1993, and has actively contributed to the scientific community through regular presentations at both national and international conferences.