Leadership
Mark Johnson
Interim Chief Executive Officer
As interim 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. Read more about Mark Johnson.
Roger Brown
Director, OPTN Operations
Liz Robbins Callahan, Esq.
Associate General Counsel
Laura Cartwright, Ph.D.
Director, Research
Tammy Farmer
Director, Enterprise Project Management Office
Michael Ghaffari
Senior Director, Engineering
Andrew Klein
Chief Medical Officer
Alicia Hennie
Vice President, External Affairs
Nadine Rogers, MBA
Director, Enterprise Data Management
Jonathan Moore
Director, Technology Operations
Ann-Marie Leary, MBA
Director, Major Initiatives
Neelam Singh
Director, Data Analytics
Paige Adrians
Director, Communications
Jacqueline O’Keefe, MBA
Senior Director, Contract & Financial Operations
Lauren Mauk
Director, Contract Operations