The Brookings Institution has announced that Vali Nasr has joined the think tank.

Nasr, a Middle East and South Asia expert, most recently served as senior advisor to the late Ambassador Richard Holbrooke, the U.S. special representative for Afghanistan and Pakistan.

Nasr joins Brookings’ Foreign Policy Program and will contribute to the Saban Center for Middle East Policy.

“Vali’s depth of knowledge and experience on the Middle East and South Asia are outstanding,” said Brookings President Strobe Talbott in a statement. “I look forward to his contributions to Brookings’s research and policy initiatives, and know he will increase public and policymaker understanding of these two dynamic regions of the world.”

Nasr is a professor of international politics at the Fletcher School of Law and Diplomacy at Tufts University and is the author of The Shia Revival: How Conflicts within Islam will Shape the Future (W.W. Norton, 2006), Forces of Fortune: The Rise of a New Middle Class and How it Will Change Our World (Free Press, 2009) and Democracy in Iran: History and the Quest for Liberty (Oxford University Press, 2006).