Tijmen Jan Moser has a PhD from Utrecht University and has worked as a geophysical consultant for a number of companies and institutes (Amoco, Institut Français du Pétrole, Karlsruhe University, Bergen University, Statoil/Hydro, Geophysical Insitute of Israel, Fugro-Jason, Horizon Energy Partners). Since 2005, he has been working as an independent consultant, associated with Z-Terra, SGS-Horizon and others. His main interests include seismic imaging, asymptotic methods, seismic reservoir characterization and diffraction. He has authored many influential papers on ray theory and ray methods, Born inversion and modeling, macro-model independent imaging, and diffraction imaging, several of which have received Best Paper awards. He has co-chaired Special Sessions devoted to Diffraction at the EAGE conferences of 2010, 2011 and 2012 and the Workshop on Seismic Diffraction Methods for Fault and Fracture Detection at the SEG conference in 2012, co-presented the EAGE Short Course on Seismic Diffraction (2011) and is co-editor of the SEG reprint volume on Diffraction (2015). He is Editor-in-Chief of Geophysical Prospecting, has served on SEG's "Geoscientists Without Borders®" and is serving on SEG's Publication Committee and EAGE's Oil, Gas and Geoscience Division Committee and Research Committee. He is a member of SEG and MAA, and honorary member of EAGE.