Stan is co-founder of The McChrystal Group, a leadership consulting firm. He is also the New York Times bestselling author of Team of Teams and the co-author of the book, Leaders: Myth and Reality, along with Jay Mangone and Jeff Eggers. Stan is retired from the U.S. Army as a four-star general after more than thirty-four years of service. His last assignment was as the commander of all American and coalition forces in Afghanistan. He is a senior fellow at Yale University’s Jackson Institute for Global Affairs.