Chollet has been a fellow at The Center for a New American Security (CNAS), the Brookings Institution, the Center for Strategic and International Studies (CSIS), and the American Academy in Berlin.
In addition to assisting Baker with his memoirs, from 1996-1999 Chollet assisted former US Secretary of State Warren Christopher with the research and writing of his books In the Stream of History and Chances of a Lifetime; Richard Holbrooke with his book To End a War.