Marc studied experimental physics at the university of Bern, Switzerland. He obtained a PhD in natural sciences from the University of Bern with a thesis on ground-based microwave remote sensing of the troposphere. He was a visiting scientist at the Smithsonian Tropical Research Institute in Panama City, Panama, where he studied tree water relations and canopy interception by means of a self-developed X-band radiometer. Marc worked with an X-band polarimetric radar during his postdoctoral studies at EPFL in Lausanne, where he developed radar data processing algorithms and conducted research on mountain meteorology and snowfall processes. He was a scientist at the National Institute of Space Research (INPE) in Cachoeira Paulista, São Paulo, Brazil, where he processed polarimetric X-band radar data in order to study tropical precipitation processes. He worked for four years as a team leader at the Federal Office of Meteorology and Climatology MeteoSwiss, where his group conducted wind-shear and precipitation measurements at airports by means of polarimetric X-band radar technology. During his employment at MeteoSwiss, he developed the first radar target simulator prototype.