Development_Dimensions_International
Development Dimensions International (DDI) is an international human resources and leadership development consultancy. DDI works with organizations to make changes related to leadership development, leadership selection, succession management, and execution and performance.
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The company is headquartered in Pittsburgh, Pennsylvania and has more than 1,100 employees throughout 42 offices in 26 countries. William C. Byham, is chairman, Tacy M. Byham is CEO, and David Tessmann-Keys is president.