Basic Qualifications: Principal Systems Engineer: Bachelor of Science degree in a Science, Technology, Engineering, or Mathematics (STEM) discipline and 5 years of experience, OR Master of Science degree in a STEM discipline and 3 years of experience, OR a PhD in a STEM discipline and 1 year experience. Preparing technical documents, provide briefings, attend security-related working groups, support ongoing authorization efforts including development of supporting documentation, develop procedures, and work in a fast-changing dynamic environment with minimal direction.