Senior Information Systems Security Engineer; ISSE

Are you interested in using your skills to help shape the Cyber, Security, & Intel space? If so, look no further. Amentum is seeking a Senior Information Systems Security Engineer (ISSE) to join our team of passionate individuals at Fort Meade, MD. In this role you will support challenging, mission-critical projects that make a direct impact on the Nation’s security and intelligence mission.

In support of DISA, Amentum’s Intel and Cyber Division is expanding a proven team of highly skilled engineers and architects to support a program that provides critical IT capabilities to the Department of Defense. This team is committed to engineering, assembling, integrating, deploying, and sustaining an innovative IT enterprise solution.

Our team delivers secure, mission-critical capabilities where system integrity and rapid deployment are paramount. We are seeking a Senior Information Systems Security Engineer (ISSE) who combines meticulous technical discipline with strategic foresight. In this role, you will lead efforts to establish and maintain robust baselines in a rapidly evolving operational environment. Success requires the ability to navigate complex, unique technical challenges independently while fostering collaborative solutions across integrated teams.

To excel, you must possess a proactive learning mindset and the agility to rapidly master and govern the integration of next-generation systems and services.

8 Hours per day, Monday thru Friday

The duties and responsibilities of the Senior Information Systems Security Engineer (ISSE) include but are not limited to the following:

The Senior ISSE leads the design, integration, and assessment of security architectures for information systems that process, store, and transmit classified and sensitive intelligence information. The incumbent applies systems security engineering principles throughout the full system lifecycle, ensures compliance with Intelligence Community (IC) and national security policy, and advises program leadership and Authorizing Officials (AOs) on risk. This is a senior technical role with significant independence, mentoring responsibility, and influence over enterprise security decisions.

• Develop and review security architectures, designs, and requirements for classified enclaves, cross-domain solutions, cloud environments, and mission applications.

• Integrate security controls into the system development lifecycle, including Dev Sec Ops  pipelines, so that security is built in rather than bolted on.
• 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 the Risk Management Framework (RMF) as implemented by the IC.

• Prepare and maintain authorization packages, including System Security Plans, Security Assessment Reports, Plans of Action and Milestones (POA&Ms), and risk assessments.

• Brief Information System Security Managers (ISSMs), Authorizing Officials, and program leadership on residual risk and recommended mitigations.

• Support reciprocity and inheritance of controls across IC elements and accrediting bodies.

• Analyze vulnerability scan results, configuration baselines (STIGs/SCAPs), and penetration test findings, and drive remediation with system owners and engineering teams.

• Support incident response, including technical analysis, root-cause determination, and lessons-learned integration into system designs.

• R…