Better Leaders. Better Future.

Get to know everything about DDI, a global leadership consulting firm that helps you 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.

Innovation as a Principle

Why Work With Us?

At DDI, we’re innovators at heart. From our founding in 1970, we have dedicated ourselves to finding science-based solutions that truly change the lives of leaders and the people they lead.

We’ve achieved this goal by being by the side of our clients to help them create and implement incredible leadership programs that deliver top results. From the first hello to measuring results, we commit ourselves to making your success, our success.

Industry Leaders

Meet Our Leadership Team

Tacy Byham, Ph.D.

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.

David Tessmann-Keys

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.

William Byham, Ph.D.

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.

Matthew Paese, Ph.D.

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.

Douglas Reynolds, Ph.D.

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.

Patsy Tsao

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.

Bruce Watt

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.

Mindy Yeh

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.

Proud of Our Clients

We are deeply proud to work alongside the leaders in many of the world’s most influential companies.

In fact, over the years we've worked with more than 75% of the Fortune 500

Proud of Our Recognition

We’ve had the honor of being recognized as a top leadership company by many of our industry’s top awards for the work we’ve done with our incredible client partners.

Excellence in Technology Award

DDI’s Inclusion: Build Empathy and My Pathway: Leadership Core experiences won Gold in two categories of Brandon Hall Technology Awards: 2021

Training Magazine Network Winner

Training Magazine Network Choice Awards winner in Leadership Development and Measurement, Testing & Assessment: 2022

5 Star Learning & Development

2021 5-Star Learning and Development Award, Human Resources Director magazine

Proud of Our Diversity

Our ability to succeed—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.

We Believe That:

  • Better leaders are diverse and inclusive leaders
  • A better future is an equitable future
  • Success depends on the strength of a diverse and inclusive workforce

We strive to do better, together, each and every day.

Proud of Our Global Culture

You might not know it, but DDI’s footprint stretches far around the globe. In fact, you can work with us in more than 90 countries.

Leadership via Communities

Proud of Our Communities

Our communities depend on great leadership. Through our U-SPARK! program, we help create better leaders in the non-profit and community organizations that shape our lives.

Learn More About U-Spark

A Culture of Success

Proud of Our People

Our people are the heart and soul of our company. Every time we survey our clients to learn what they value most about working with DDI, we hear the same top answer: They love our people.