From October 2000 to March 2002, he was with the Frequency and Radar Systems Department, HR, German Aerospace Center, DLR, Oberpfaffenhofen, Germany. From June 2003 to December 2005, he has been with the Image and Remote Sensing Group – SAPHIR Team, in the Institute of Electronics and Telecommunications of Rennes (I.E.T.R. – CNRS UMR 6164), Rennes, France. In January 2006, he joined the Universitat Politècnica de Catalunya as a Ramón-y-Cajal researcher, Barcelona, Spain, where he has been associate professor in the area of remote sensing and microwave technology until April 2017. Since May 2017 he is responsible of the Remote Sensing and Natural Resources Modelling team in the Luxembourg Institute of Science and Technology in Luxembourg. His research interests include SAR and multidimensional SAR, radar polarimetry, physical parameter inversion, digital signal processing, estimation theory and harmonic analysis.