David A. Nadler (1948–2015) was an American organizational theorist, consultant and business executive, known for his work with Michael L. Tushman on organizational design and organizational architecture.
Nadler obtained his BA in International Affairs at George Washington University, his MBA from Harvard Business School and his MA and his PhD in Psychology at the University of Michigan.
After his graduation Nadler joined Columbia University, where he was appointed associate professor at the Columbia Business School in the early 1980s. In 1980 he was founding director of the consultancy firm Delta Consulting Group, Inc., which was acquired by Mercer in 2000, and became Mercer Delta Consulting, LLC. In 2007 he became vice chairman of Marsh & McLennan Companies.
Nadler was elected member of the Academy of Management and Fellow at the American Psychological Association. in 2004 he was named by Consulting Magazine among the 25 most influential consultants in the United States.
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