He earned a M.Sc. and Ph.D. in Computer Science from the University of Paris 7, France. His Ph.D. was funded by the European project Verificard (Verification of Java Card programs). He was a research associate at the University of York, U.K, from 2004 to 2006. Nestor's main research interests are the development of JML‐based tools and techniques for the verification of programs, and the mechanization of machine‐checked correctness proofs of mathematical algorithms. He has published in international research conferences on formal methods.