In 1991 he returned to Israel and began his career as a senior scientist at the Dept. of Particle Physics (Weizmann Institute of Science). In 1997, he was appointed Associate Professor and was promoted to full professor in 2003. Since 2001, he has been an external member of the Max Planck Institute for Nuclear Physics in Heidelberg, Germany, and in 2005, he was appointed as a Director at this Max Planck Institute.