ISSE for SAP & Classified Systems (Top Secret)

Leidos; San Diego (CA); On-site; USD 108,000 - 195,000; Full time

Job summary

Leidos is seeking an Information System Security Engineer (ISSE) to support classified information systems and provide security engineering across the full lifecycle. The role emphasizes RMF/JSIG compliance, DISA STIGs, Nessus, and risk reduction, with a requirement for DoD Top Secret clearance and SCI eligibility; on-site in San Diego.

You will collaborate with ISSMs, ISSOs, and system admins, developing secure baselines, automation, and documentation to ensure continuous monitoring and audit

Qualifications

• Bachelor's degree or higher with relevant experience or equivalent.
• Active Top Secret clearance with eligibility for SCI.
• DoD 8140/8570 IAT II+ certification (Security+ accepted).

Responsibilities

• Serve as ISSE for SAP information systems across full system lifecycle.
• Design and maintain secure classified information systems per JSIG/RMF and program requirements.
• Develop and maintain system security architecture including segmentation, authentication, encryption, auditing, and data protection.
• Implement DISA STIGs, SRGs, vendor guidance, and program hardening across Windows, Linux, and networks.
• Coordinate with ISSMs, ISSOs, System Administrators to resolve security/compliance issues.
• Build secure baselines, procedures, and automation to improve repeatability and compliance.
• Support security assessments, ATO processes, and audits with objective evidence of controls.

Skills

Technical documentation

Security concepts

Troubleshooting complex issues

Communication skills

Education

Bachelor's degree or higher

DoD 8140/8570 IAT II or higher certification

Tools

Nessus

STIGs

Active Directory

Job description

Leidos is seeking an Information System Security Engineer (ISSE) to support classified information systems and provide security engineering across the full lifecycle. The role emphasizes RMF/JSIG compliance, DISA STIGs, Nessus, and risk reduction, with a requirement for DoD Top Secret clearance and SCI eligibility; on-site in San Diego.

You will collaborate with ISSMs, ISSOs, and system admins, developing secure baselines, automation, and documentation to ensure continuous monitoring and audit