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Our Management Team

DDI was built from the inside out, not the outside in. Our management team has a long history of entrepreneurship, investing in leadership development infrastructure and products that help our clients be successful and a business philosophy based on values that benefit our clients, our associates and our company equally.

Tacy Byham, Ph.D.
Chief Executive Officer
As DDI Chief Executive Officer, Tacy oversees the organization’s day-to-day operations and is spearheading increased strategic focus on DDI's core of leadership insight and growth. Read Full Bio
David Tessmann-Keys
President David Tessmann-Keys is committed to promoting a workplace where both men and women have opportunities to advance their careers and to realize their full potential. Read Full Bio
William C. Byham, Ph.D.
DDI Founder and Executive Chairman
Bill Byham is cofounder and executive chairman of DDI. Bill works to establish the vision, values, and strategic direction of the company. He supervises major DDI product development and consulting projects. Read Full Bio
Matthew J. Paese, Ph.D.
Senior Vice President, Succession Management & C-Suite Services
Matthew is the leader of DDI’s Executive Services group, where he and his team help CEOs, boards, senior teams, and executives enhance leadership to grow business, cultural, and personal success. Read Full Bio
Douglas Reynolds, Ph.D.
Executive Vice President, Innovations and Technology
Doug Reynolds, Ph.D., is the Executive Vice President of Innovations and Technology at DDI. Read Full Bio
Audrey Smith, Ph.D.
Senior Vice President
Audrey Smith, Ph.D., co-leads DDI’s Executive Services business. Read Full Bio
Patsy Tsao
Senior Vice President and Chief Financial Officer
Patsy Tsao is senior vice president and chief financial officer of DDI. She is responsible for the administrative, financial, and risk management operations of the company worldwide. Read Full Bio
Bruce Watt, Ph.D.
Vice President
Dr. Bruce Watt, Ph.D., is the Vice President for DDI Europe, India, Australia, licensee operations, and our Global Centre for Excellence. Read Full Bio
Mindy Yeh
Vice President Asia
Mindy Yeh is Vice President, Asia, for DDI. She’s responsible for market and product strategy development, and integration of ASEAN and Greater China, covering markets of mainland China, Hong Kong, Taiwan, Thailand, Singapore, Malaysia, and Philippines. Read Full Bio
Talk to an Expert: Our Management Team
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