Senior ISSE: Threat-Informed Cyber Risk Architect

Leidos LLC; Maryland; On-site; USD 154,000 - 278,000; Full time

Job summary

Leidos is seeking a Principal ISSE to join a focused team delivering IA architecture analysis and security engineering for NC3/COG and senior leader communications. The role emphasizes threat-informed cybersecurity products, risk assessments, architecture reviews, and real-time capability support.

Required are 20+ years as an ISSE/Systems Engineer, strong RMF experience, and DoD briefing skills. Active TS/SCI with polygraph clearance is expected, with collaboration across stakeholders and

Qualifications

• Bachelor degree in a relevant field with 20+ years of experience as an ISSE/Systems Engineer.
• Expertise in Risk Management Framework (RMF) and cybersecurity risk assessments.
• Knowledge of NIST SP 800-series publications and CNSSI 1253.
• Ability to briefing DoD officials and communicate complex security concepts clearly.

Responsibilities

• Lead threat-informed cybersecurity products, risk assessments, and architecture reviews for mission systems.
• Evaluate architectures against security requirements and propose mitigations.
• Design and implement IA/security systems across networking, computing, and enclaves.
• Research emerging technologies like Zero Trust and Cloud for security viability.
• Collaborate with stakeholders to define security objectives and validation methods.

Skills

RMF expertise

Threat modeling

Cyber risk assessments

Education

Bachelor of Science in Computer Science / Information Assurance

CISSP

ISSEP

Job description

Leidos is seeking a Principal ISSE to join a focused team delivering IA architecture analysis and security engineering for NC3/COG and senior leader communications. The role emphasizes threat-informed cybersecurity products, risk assessments, architecture reviews, and real-time capability support.

Required are 20+ years as an ISSE/Systems Engineer, strong RMF experience, and DoD briefing skills. Active TS/SCI with polygraph clearance is expected, with collaboration across stakeholders and