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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
As president, David is responsible for developing and executing DDI’s global business strategy, including sales, marketing, business development, consulting, and financial performance. 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 co-leads 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 leads DDI’s product development and technology groups, which are accountable for the design and implementation of new behavioral and psychological assessments used for workforce selection, career development, and executive succession management. Read Full Bio
Audrey Smith, Ph.D.
Senior Vice President
Dr. Audrey Smith co-leads DDI’s Executive Services business. An avid-practitioner, thought-leader, and architect for DDI’s C-suite and succession offerings, she has over 25 years’ experience with boards, CEOs, and executive teams striving for high performance, business transformation, and growth. 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
Bruce is responsible for creating and executing DDI’s business strategy across Europe, India, and Australia. He also supports DDI’s Global Centre for Excellence, focusing on client service and experience. Read Full Bio
Mindy Yeh
Vice President Asia
Mindy Yeh leads DDI's business strategy and operations in the Greater China region, including Hong Kong, Mainland China, and Taiwan. Read Full Bio
Talk to an Expert: Our Management Team
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