Dr Zittis is a Research Scientist at the Climate and Atmosphere Research Center (CARE-C) of the Cyprus Institute and also an Assistant Instructor in the MSc Program in Environmental Sciences. His research interests include climate change and impacts, regional climate modelling, hydro-climatic extremes, climate change education and communication.

He has previously worked as a Post-Doctoral Fellow at the Max Planck Institute for Chemistry and the Energy, Environment and Water Research Center of the Cyprus Institute.

Since 2020, he has been an Editorial Board Member of Springer's Regional Environmental Change. He is Chair of the MedCLIVAR scientific network, and contributes to CORDEX, and other international initiatives about climate change and its impacts on the broader Mediterranean and Middle East region.