The Contractor will assist the Government to perform engineering program execution functions to include the development, test and modification assessments of division program systems (to include air vehicle, ground segment, payloads, and associated support equipment) with emphasis on the interoperability in the areas of networkengineering, communications engineering, sensor engineering, ISR enterprise engineering and systems architecture engineering. Senior: Possesses the advanced knowledge, experience, and recognized ability to be considered highly skilled in their technical / professional field. Possesses the ability to perform tasks and oversee the efforts of junior and journeyman Contractor personnel within the technical / professional discipline. Demonstrates advanced knowledge of their technical / professional discipline as well as possess a comprehensive understanding and ability to apply associated standards, procedures and practices in their area of expertise. (Program Office, Enterprise and Staff Level Support interface).