Dr. Johnson is a Senior Analyst at the Northrop Grumman Corporation's Analysis Center, where she is responsible for assessing space- and missile-defense-related policies and trends. Prior to joining Northrop Grumman in June 2003, Dr. Johnson was a Political Scientist with the RAND Corporation for nearly 15 years, where she worked on a wide range of studies dealing with different aspects of space policy, programs, and agencies. Her research has focused in particular on space control and anti-satellite policy, the contribution of space systems to theater operations, international space policies and programs, and policy issues pertaining to the U.S. aerospace industrial base and to U.S. remote sensing activities. She is the co-author of Space: Emerging Options for National Power, Space Weapons, Earth Wars, and Policy Issues, and Challenges for Interagency Space System Acquisition and author of Space Roles, Missions, and Functions: The Challenge of Organizational Reform.