He was one of the editors of the Hebrew University Bible Project. He is a member of the editorial board of the journals "Dead Sea Discoveries" and the "Journal of Jewish Studies". He served on the Academic committee of the Magnes Press. He is the co-founder and chairman (1991–2000) of the Dead Sea Scrolls Foundation, a Member of the Academic Committee of the Orion Center for the Study of the Dead Sea Scrolls, and Senior Associate Fellow of the and an Honorary Fellow of the Oxford Centre for Postgraduate Hebrew Studies.