Senior ISSE: Secure Cloud, Zero Trust & Defense IT

Amentum; United States; On-site; USD 120,000 - 160,000; Full time

Job summary

Amentum is seeking a Senior Information Systems Security Engineer (ISSE) to join our Cyber, Security, & Intel team at Fort Meade, MD. You will lead security architecture design for classified systems, integrate RMF controls, and advise leadership on risk and mitigations to support mission-critical programs.

The role emphasizes independent problem solving, collaboration across integrated teams, and the ability to evolve security baselines in a dynamic enterprise environment supporting national

Qualifications

• Experience designing security architectures for classified enclaves and cross-domain solutions.
• Ability to apply RMF controls across the full system lifecycle.
• Experience briefing leadership on residual risk and mitigations.

Responsibilities

• Develop and review security architectures for classified enclaves, cross-domain solutions, cloud environments, and mission applications.
• Integrate security controls into the system development lifecycle, including DevSecOps pipelines.
• Evaluate emerging technologies (zero trust, cloud services, AI/ML tools, containerization) for security implications and recommend risk-informed adoption strategies.
• Define and validate security requirements traceable to mission needs, threat models, and applicable controls.
• Lead system categorization, control selection and tailoring, implementation, assessment, and continuous monitoring under RMF as implemented by the IC.
• Prepare and maintain authorization packages, including System Security Plans, Security Assessment Reports, Plans of Action and Milestones, and risk assessments.
• Brief ISSMs, Authorizing Officials, and program leadership on residual risk and recommended mitigations.

Skills

Security architectures

DevSecOps

RMF processes

Threat modeling

Cross-domain solutions

Risk management

Job description

Amentum is seeking a Senior Information Systems Security Engineer (ISSE) to join our Cyber, Security, & Intel team at Fort Meade, MD. You will lead security architecture design for classified systems, integrate RMF controls, and advise leadership on risk and mitigations to support mission-critical programs.

The role emphasizes independent problem solving, collaboration across integrated teams, and the ability to evolve security baselines in a dynamic enterprise environment supporting national