Information Systems Security Engineer

Leidos’ AEGIS program is seeking an Information Systems Security Engineer to support advanced cybersecurity engineering for NASA Advanced Supercomputing (NAS) systems and HPC environments. The position focuses on system security planning, compliance execution, and senior technical leadership across complex, performance-critical compute infrastructures.

Mountain View, CA (onsite)

USD 131, per year

As an Information Systems Security Engineer, you will lead and oversee development and maintenance of System Security Plans (SSPs) and security compliance activities. This includes A&A support
, vulnerability assessments, POA&M remediation, and HPC-specific security guidance tailored to large-scale simulation workloads, mission operations, and research productivity.

• Ensure compliance and integrity of SSPs and related security artifacts with NASA and U.S. Government requirements, including NPR 2810.1F
  , NIST 800-53/53B
  , FISMA
  , and NIST HPC Security Overlay guidance.
• Act as a senior technical advisor to internal and external stakeholders on advanced HPC security challenges, including system hardening for MPI-based workloads
  , GPU/accelerator nodes
  , and high-speed fabrics such as Infini Band and Slingshot
  , as well as performance-critical parallel file systems.
• Evaluate and recommend advanced security solutions that balance high-performance computing capabilities with strong cybersecurity protections.
• Lead analysis and reporting of HPC-specific security data, including vulnerability assessments, risk evaluations, security telemetry, and compliance findings, with actionable recommendations to Division and Branch leadership.
• Oversee development, tracking, and remediation of Plans of Action and Milestones (POA&Ms) across HPC systems, coordinating resolution efforts with systems engineering, networking, storage, and operations teams.
• Conduct complex compliance assessments of large-scale HPC environments, assessing high-speed interconnect configurations, MPI-node exposure risks, GPU driver-level vulnerabilities, and HPC authentication and authorization workflows; present findings to NAS leadership.
• Provide technical leadership and coordination to implement, enforce, and maintain compliance with Government cybersecurity policies, including NPR 2810.1F
  , NIST 800-53/800-53B
  , NIST SP 800-234
  , DHS directives,
  FIPS standards
  , OMB guidance
  , and FISMA requirements.
• Coordinate senior technical expertise during NASA Assessment and Authorization (A&A) activities, including data calls, technical evaluation support, control inheritance definitions, and documentation updates.
• Lead credentialed and performance-aware vulnerability assessments across HPC environments, ensuring scanning methodologies accommodate GPU nodes, high-speed fabrics, and parallel file systems without impacting mission-critical workloads; provide risk-based recommendations to NAS leadership and Information System Security Officials (ISSOs).
• Evaluate and elevate potential or actual HPC security incidents and support investigations with the NASA Security Operations Center (SOC), Incident Response Teams, and NAS Management.
• Lead technical Root Cause Analysis (RCA) efforts for complex HPC security issues, including system performance anomalies, distributed job failures, and vulnerabilities affecting parallel computing environments.
• Provide technical guidance for developing and refining cybersecurity policies, procedures, and guidelines for HPC computational, storage, networking, and data-analysis systems to maintain NASA and federal security compliance.
• Maintain HPC cybersecurity expertise by evaluating emerging threats, technologies, and advisories from NASA, NIST, DOE, and industry sources; advise facility staff on…