Carl Jefferson
Ph.D., MBA, MSOD, PCC
Carl Jefferson is the Founder and Managing Partner at The Mattering, a people-centric management and leadership development group. Carl developed the Five Performance Principles in response to his private and public sector clients’ need to improve their people’s performance. These principles constitute a guiding heuristic for transitioning average organizational performance and engagement into that of an industry leader.
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Carl is the Vice Chairman, National Board of Directors at the National Association of African Americans in Human Resources which is the world’s largest and oldest membership association for black and brown professionals in HR and DEI.

As a Human Resources and Organizational Leadership Executive, Carl’s career assignments have included serving as Chief People Officer of the Unreasonable Group, Chief People Officer of Al Copeland Investments, VP of Human Resources and Organization Development Consulting – Wachovia Corporation and Head of Denny’s People Division – Denny’s Restaurant Corporation. He has advised and coached CEO and U.S. Presidents Political Appointees in the Obama, Trump, and Biden Administrations.
Carl earned a BA in Psychology from the University of Baltimore, and two graduate degrees from The Johns Hopkins University -- MS in Organization Development & Human Resources Management and an MBA in General Management. He completed his Ph.D. coursework and research in Organizational Leadership at the University of Maryland, Eastern Shore – a HBCU. He is a certified executive coach and holds qualifications and certifications to administer psychometric assessments and predictive indexes.
Carl was born and raised in Baltimore and is passionate about supporting teams in achieving breakthroughs on TRUST and FEAR gaps.