Kirkland & Ellis recently announced that national security expert Mario Mancuso will join the firm as leader of the National Security and Committee on Foreign Investment in the United States practice.  He will divide his time between the firm’s D.C. and New York offices, serving clients on related transactional, investigative and advisory matters worldwide.  Mancuso joins Kirkland from Fried Frank where he was head of the international trade and investment, aerospace and defense, and Israel practices.