Consultant Biographies
JACK JEFFERIES
Jack Jefferies is an associate senior consultant with Guttman Development Strategies, Inc., to which he brings nearly two decades of experience in the areas of leadership and team development, executive performance, and group dynamics. Organizations work with Jack to create high performance through developing leaders, aligning teams, and integrating horizontal structures. He has worked with many organization, including: Aetna Health, Bernstein/Alliance Capital, Grey Mountain Partners, Pfizer Pharmaceuticals, and the State of Vermont's Agency for Human Services.
Previously, Jack worked with a leadership and organization development consulting firm, where he was responsible for partnering with senior leaders to implement the shift to team-based systems and to design and execute leadership development programs.
Jack's talents in developing leaders and teams can be attributed to his extensive experience working with businesses in a variety of industries, as well as his own achievements as a world-class athlete and coach. As captain of the U.S. Skydiving Team, Jack won multiple world championships and national titles. While he held that position, he was the most sought-after coach in the sport, serving as head coach for the national teams of England, Brazil, Germany, Denmark, and Sweden.
Jack has spoken at professional conferences and top-level universities on topics such as building high-performance teams, performing under pressure, and negotiating. As an author, he's been published in Jossey-Bass's Leadership Lessons from West Point, and in the OD Practitioner on subjects related to developing high-potential talent and sustaining learning in teams.
Jack holds an M.S. from the American University/NTL program in organization development and is an adjunct faculty member at the United States Military Academy at West Point's Department of Behavioral Science and Leadership.