214.357.8550 carol@amca.com


Discovering Team Talent to Build Successful Teams Using the Herrmann Brain Dominance Instrument®

The Whole-Brain Approach

Trammell McGee-Cooper and Associates has been partnering with Herrmann International for over 20 years to deliver the Herrmann Brain Dominance Instrument® as a part of our Leadership Development Programs.  While we have used and participated in many types of workstyle assessments, we highly recommend the use of the HBDI® with our Clients.  It was developed by Ned Herrmann in 1979 after researching the work of brain scientists—Roger Sperry, Paul MacLean, Joseph Bogen, and Michael Gazzanaga.

Duane Trammell

Certified Practitioner, HBDI®

Mike Blevins 

Certified Practitioner, HBDI®

The HBDI® consists of a 120 question self-assessment that can be taken online, then interpreted by a certified practitioner.  Team profiles are also available.  Once an individual understands his or her thinking style preferences, the door is open to improved communication, leadership, management, problem-solving, decision-making, and other aspects of personal and interpersonal development.

In addition to being used in our Leadership Development Program, we have found the HBDI® to be extremely helpful in new project partnering alignments and in solving interpersonal challenges between individuals within organizations.


Let us unleash your potential


Increases productivity


Better decision-making


Elevated performance


Employee engagement


Lower turnover

Trammell McGee-Cooper and Associates

Developing Talent and Teams to Achieve Bold Dreams through the Art of Leadership.

© 2017 TMCA, Inc.