Leadership
Mark Johnson
Chief Executive Officer
As CEO, Mark Johnson’s leadership and expertise ensure UNOS meets its mission to save and transform as many lives as possible through research, innovation and collaboration.
Paige Adrians
Director, Communications
Roger Brown
Director, OPTN Operations
Engel Burns
Vice President, External Affairs
Liz Robbins Callahan, Esq.
Associate General Counsel
Laura Cartwright, Ph.D.
Director, Product
Anthony Coelho
Vice President, Technology and Engineering
Tammy Farmer
Director, Contract Operations
Michael Ghaffari
Chief Information Officer, OPTN
Ann-Marie Leary, MBA
Director, Major Initiatives
Lauren Mauk
Director, OPTN Projects
Nadine Rogers, MBA
Director, Enterprise Data Management
Tamara Rowe
Senior Director, People Operations and Shared Services
Neelam Singh
Director, Data