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About DDI

We Help You Hire, Promote, and Develop Exceptional Leaders

Get to know DDI, a global leadership consulting firm celebrating 50 years of helping organizations hire, promote, and develop exceptional leaders. From first-time managers to C-suite executives, our commitment is to be by your side to help you make every moment of leadership count. 

We invite you to take a minute and watch this video. We'd love for you to get to know us and our approach to leadership.

Better Leaders. Better Future.

Our passion is to help leaders grow and deliver impact for a better future - for your company, for themselves, for their families, and for their communities. We do this at every level of the organization, from helping you recognize the first signs of leadership potential to putting your next CEO in place.

Ask anyone at DDI what they do, and they’ll tell you: They help build better leaders for a better future. Every person you’ll work with is invested in helping you drive success. 

For every step of your journey, we'll be by your side with five decades of experience and award-winning solutions.

Our Global Awards

Better Leaders Mean Better Business

Our Approach

We failed to create a 25th hour in the day. Instead, we created Leadership 480SM.

Based on our work with millions of leaders for five decades, we came to one simple conclusion: Time is the #1 barrier to great leadership. 

We can change that. Leadership 480SM is DDI’s strategic framework to help you hire, promote, and develop exceptional leaders who maximize their effectiveness in every minute, every day, and every month of their careers. And it all revolves around one powerful number: 480.

Learn about Leadership 480

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Leadership Development for Every Moment

As your company competes in a fast-changing economy, leaders who rapidly develop new skills are in the best position to help your company win. But you can’t leave developing your leaders to chance.

That’s why we created a leadership development subscription. With our subscription, you’ll have proven content at your fingertips to help your leaders quickly solve their toughest leadership development challenges. And it’s all for one price.

Learn about DDI’s Leadership Development Subscription

Our Leadership Team


Our management team has a long history of entrepreneurship and a business philosophy that equally benefits our clients, our associates, and our company. Click on a photo below to get to know our leaders.

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.

Learn more about Tacy

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.

Learn more about David

William C. Byham, Ph.D.
DDI Founder and Executive Chairman

Bill is cofounder and executive chairman of DDI and works to establish the vision, values, and strategic direction of the company. He supervises major DDI product development and consulting projects.

Learn more about William

Matthew Paese, Ph.D.
Senior Vice President, Practice Leader

Matt 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.

Learn more about Matthew

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.

Learn more about Doug

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.

Learn more about Patsy

Bruce Watt, Ph.D.
Senior Vice President, Europe, Australia, India, and Licensee Partners

Dr. Bruce Watt, Ph.D., serves as Senior Vice President for DDI Europe, India, Australia, licensee operations, and our Global Centre for Excellence.

Learn more about Bruce

Mindy Yeh
Senior Vice President, Asia

Mindy Yeh leads DDI's business strategy and operations in the Greater China region, including Hong Kong, Mainland China, and Taiwan.

Learn more about Mindy

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Committed to Inclusion & Diversity

We recognize that our ability to succeed as an organization—to innovate, to meet the needs of our clients, and to be a market leader—depends on the strength of a diverse and inclusive workforce.

At DDI, we’re committed to inclusion and diversity. We believe that:

  • Better leaders are diverse and inclusive leaders.
  • A better future is an equitable future.

We strive to do better, together, each and every day. Our leaders and future depend on it. 

Read Our I&D Statement

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DDI’s U-SPARK! Grant Program

Make a Difference With Your Favorite Nonprofit Organization!

DDI is committed to not only enhancing organizational performance, but to enriching people's lives, communities, and the world. We believe that by building skills and sharing our leadership programs, we will help make them more effective in fulfilling the missions of their organizations.

Learn more about U-SPARK!