In Israel there are a few universities and institutes which offer post doc programs and fellowships, among them: The University of Haifa, The Hebrew University, The Tel Aviv University, Weizmann Institute of Science, The Ben Gurion University and The Technion. The duration of most of the programs is two years. Candidates must complete their PhD prior to applying. I've attached a link at the end of my message to an article that gives more information about the tracks and the institutes you can choose from and more. I advise you to contact those institutions directly to find out which one can offer you the best program and the best scholarship or funding.