Celebrating 50 Years

Changing the World—One Organization at a Time®

2021 marks 50 years of Human Synergistics partnering with change agents like you to promote Constructive change around the world.


Organizational Culture Inventory® (OCI®)


Life Styles Inventory™ (LSI)


Accredited practitioners
around the world


Human Synergistics offices
across the globe

50 Years of Promoting Constructive Change

Over the past 50 years, we’ve broadened our global impact by adding international offices, contributing to academic research, and developing, team-building simulations, accreditation workshops, and consulting services. Thanks to those of you who joined us decades ago in Strengthening Organizations through Individual Effectiveness or more recently in Changing the World—One Organization at a Time®.

See our full HS TIMELINE

HS 50th Timeline

Kathy Opp and Kathy Hagler
Read their story.

Advanced Technology Services, Inc.
Jim Hefti
Hear their story.

Perme & Peterson Associates
Cathy Perme and Amber Peterson
Hear their story.

Our Circumplex

In 1971, J. Clayton Lafferty, Ph.D., set out to provide groundbreaking yet accessible leadership development tools to HR professionals. Dr. Lafferty’s original clock-like model fueled the development of one of the first 360 feedback tools, the Life Styles Inventory™. After modifying the clock and renaming it the “Circumplex,” Robert A. Cooke, Ph.D., joined Clay in developing an integrated diagnostic system, starting with the Organizational Culture Inventory.


The Circumplex assessment of leaders and team members