Software Engineer/Developer at 00100 LEIDOS, INC.

The TS/SCI with polygraph is an explicit hard gate stated in Basic Qualifications — candidates without an active clearance at this level cannot be considered.

The degree requirement accepts either a BS with 4–8 years or a Masters with 2–6 years of relevant experience; because equivalent experience paths exist, the degree requirement is set to None. The overall years minimum of 4 reflects the lowest stated threshold (BS path).

DoD 8570 certification (typically Security+) is listed as a Basic Qualification and treated as a hard gate.

Linux/Unix/Windows OS and application management appears in both Basic and Preferred Qualifications; it is marked required based on its presence in Basic Qualifications.

Python, Bash, and XML are listed together as scripting examples under Preferred Qualifications ('e.g. PyThon, BaSH, XML') — they are preferred, not required. Python is used as the primary skill name with Bash and XML as alternatives since the posting treats them as interchangeable examples of scripting.

GPU computing and web services/imagery server development appear only in the narrative responsibilities section, not in a formal requirements block; they are marked preferred accordingly.

DEC VMS / Alpha is explicitly listed under Preferred Qualifications as mission-specific technical knowledge.

The role involves classified R&D and rapid prototyping for intelligence missions; the alternative occupation of 15-1299 reflects the multi-INT / intelligence-systems flavor that doesn't map cleanly to standard software development.

Requires a TS/SCI clearance — the cleared population is a small fraction of this occupation, so the real candidate pool is materially smaller than the estimate below, which does not model clearance.