The Administrative Assistant will provide essential administrative support to the Pantheon Portfolio of programs within Constellation Management and Control (CMC) under the Space Intelligence, Surveillance and Reconnaissance (S-ISR) mission area. This role involves working closely with senior managers and program team leads, ensuring smooth office operations and effective communication across teams. The successful candidate will be responsible for managing calendars, answering phones, composing reports, and assisting with various special tasks to facilitate the program's operations.