Zachary Parker President, CEO, and Board Director Kathryn JohnBull Chief Financial Officer Maliek Ferebee Chief Human Resources Officer Mary Dowdall President, Advanced Mission Services Diane Yarnell President, Health IT Billy Burnett President, National Security Programs Jeanine Christian President, Public Health & Scientific Research David Affeldt President GRSi Operating Unit Kevin Wilson Corporate Executive, Strategic Advisor Dr. Sandra Halverson Vice President, Chief Scientist
