Giovanni Stefani is former Full Professor of Experimental Physics at the Università Roma Tre and, at present, Senior Associate at ISM-CNR.  His primary field of expertise is the electronic structure of correlated systems probed by coincidence spectroscopies.  He and co-operators has greatly contributed to developing spectroscopies such as the (e,2e), the (γ,2e) and the Angle Resolved Auger Photoelectron Coincidence Spectroscopy (AR-APECS) thus shading more light on correlated behaviour of electron pairs in various aggregation states of matter.  He and co-workers discovered a dichroic effect in AR-APECS relevant to comprehension of magnetism at the atomic scale.  His early scientific activity was devoted to atoms and molecules, while in the second part of the carrier his interests widened including clean metal surfaces and overlayers, thus contributing at strengthening interdisciplinary links between atomic and solid state physics. Lately, he successfully applied (e,2e) and (γ,2e) spectroscopies to ascertaining mechanisms of secondary electron generation in radiation\particle interaction with matter. His work has been always at the cutting edge of what is technologically achievable.  For his pioneering work in electron coincidence spectroscopies, he has been elected Fellow of the American Physical Society.  He has served as Chairman of the Board of Directors of a few scientific bodies, Conferences and Symposia, Synchrotron Radiation Users’ Committee and Secretary of a section of the EPS Atomic and Molecular Division.