Claudio Carra received his B.S. in Organic Chemistry (1995) from the University of Turin, Italy, and his Ph.D. in Physical Chemistry (2001) from the University of Fribourg, Switzerland. His graduate work involved the spectroscopic and theoretical study of reactive intermediates generated in cryogenic matrices by photolysis and radiolysis. In 2001 he obtained a Post Doctoral position in the group of Prof. S. Hammes-Schiffer, at Penn State University, sponsored by a Swiss National Science Foundation (SNSF) grant. This research activity focused primarily on the theoretical studies of proton-coupled electron transfer (PCET) in biological systems. In 2003 he joined the research group of Prof J.C. Scaiano at the University of Ottawa. He investigated the origin of interactions of fluorescent dyes with single and double-strand DNA, achieved by classical dynamics methods. The research was extended to a study, performed by density functional theory (DFT) and ab-initio methods, of the reaction mechanisms of systems on the ground and excited states. In 2006 he joined the NASA/JSC Space Radiation Project. Dr. Carra’s current research focuses the modeling, by molecular dynamics and quantum mechanics, the mechanism of the base-excision repair (BER) process in a Deinococcus radiodurans.