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's' 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 responsible for developing and executing DDI’s global business strategy and leading all components of the company’s global operations across the Americas, EMEA, Greater China, and Asia Pacific.

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.

Patsy Tsao

Patsy Tsao

Senior Vice President and Chief Financial Officer

Patsy is responsible for the administrative, financial, and risk management operations of the company worldwide.

Kelli Buczynski

Kelli Buczynski

Chief People Officer

Kelli is responsible for the execution of DDI’s people and culture strategy around the world.

Gina Dickson

Gina Dickson

Chief Product and Marketing Officer

At DDI, Gina leads teams in product management, product development content, marketing, global field enablement, and DDI’s Center for Analytics and Behavioral Research.

Douglas Reynolds, Ph.D.

Douglas Reynolds, Ph.D.

Chief Science Officer

As Chief Science Officer, Doug is focused on advancing the science and application of leadership assessments, including the responsible and ethical use of AI. He also oversees R&D processes and innovation investments.

Julie Simmons

Julie Simmons

Chief Information Officer

As Chief Information Officer, Julie Simmons leads DDI's global technology strategy for its suite of leadership products as well as its internal data and systems infrastructure.

Jazmine Boatman

Jazmine Boatman

Senior Vice President, U.S. Operations and Customer Success Strategy

Jazmine believes passionately in the mission of building better leaders and is responsible for the business strategy and execution for DDI’s U.S. market. 

Bruce Watt

Bruce Watt, Ph.D.

Senior Vice President, Europe, Australia, India, and Licensee Partners

Bruce leads DDI’s operations in Europe, Australia, and India, as well as DDI’s licensee partnerships around the world.

Mindy Yeh

Mindy Yeh

Senior Vice President, Asia

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

Steve Runkel

Steve Runkel

Senior Vice President, Global Sales Strategy

Steve plays a key role in developing DDI’s international sales and go-to-market strategy, as well as leading DDI’s U.S. sales team.

Joni Murello

Joni Murello

Vice President, General Counsel

Joni manages all DDI’s legal, regulatory, and contractual compliance globally.

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.

Ranked Among Best Employers

DDI named to Forbes 2024 America's Best Employers list

Training Magazine Network Winner

Training Magazine Network Choice Awards winner in Leadership Development and Measurement, Testing & Assessment: 2023

Top HR Service Provider

2022 Learning and Development winner, 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

We work by the side of our clients around the world. See where our people are closest to you.

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.