Ronald Koomans studied geology at Utrecht University and did his PhD at the nuclear physics lab of the University of Groningen on the application of an underwater gamma-ray spectrometer to study the transport of sediments in the coastal zone. Together with Han Limburg, Koomans founded Medusa Explorations in 2000. Koomans is an expert on applying gamma-ray sensors and developing application models for mapping grain size, texture and contamination of soil and sediment.