Dr. Mandel was the only usability/human factors consultant to the DTE Energy and Detroit Edison company for a period of six years. He worked with the CEO, CIO, and IT Director on call center, billing applications and internal/external websites. DTE is one of the largest gas, electric and nuclear energy companies in America. Mandel created a Human Factors Center of Excellence and usability lab facility within the company. Applications and websites include portals, nuclear systems management and call center systems.