Gitis received his M.Sc. degree from the Moscow State Mining University and his Ph.D. from the Hebrew University of Jerusalem. He then worked as a researcher at the US EPA in Cincinnati and at the IWW in Mülheim a/d Ruhr, Germany. Gitis has published over 70 peer-reviewed papers in international journals, co-authored the textbook Ceramic Membranes – New Opportunities and Practical Applications and co-edited Handbook of Porous Materials, and invented several patents. Since joining BGU, he has mentored over 50 graduate students. Nine of his graduates hold academic positions. Gitis serves on several scientific and management committees, including the IWA Specialist Group on Particle Separation. In 2010 he was appointed as Marie Curie Visiting Professor at the University of Amsterdam, and in 2018 he was appointed as Visiting Professor at the University of Adelaide.