Jobs and Careers
AM

Information Systems Security Engineer (ISSE)

Amentum
United Statesfull_timeVerifiedPosted 19 Aug 2025

About the role

Information Systems Security Engineer (ISSE)  - (CIS0003SM) 

Your Impact:

 

Your Impact:

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

We are seeking a highly skilled and experienced Principal Information System Security Engineer to join our team. The successful candidate will bring extensive knowledge and hands-on experience in cybersecurity engineering, risk management frameworks, and secure software development lifecycle management. This role involves leading and managing accreditation efforts, conducting risk assessments, and collaborating with cross-functional teams to ensure the highest standards of information security across our applications and systems.

Responsibilities:

  • Oversee cybersecurity measures for applications within an agile software environment.
  • Manage the assessment and authorization (A&A) efforts for accrediting and reaccrediting system authorizations.
  • Performs vulnerability scanning to uncover any potential security concerns within the information systems.
  • Utilize common control provider (CCP) knowledge to secure authorization for applications on new platforms.
  • Work closely with stakeholders to ensure seamless decommissioning and accreditation of replacement systems with no downtime.
  • Conduct technical exchange meetings (TEMs) and liaise with key departments to facilitate A&A efforts. 
  • Track and manage Plan of Action and Milestones (POAMs) across all systems, ensuring completion and recommending remediation steps.
  • Conduct system self-scans to support initial, update, and reaccreditation efforts.
  • Perform technical planning, system integration, verification and validation, and risk assessments. 
  • Create Basis of Estimate (BOE) documentation and other critical artifacts for system A&A efforts.
  • Develop and document security evaluation test plans and procedures.
  • Provide documentation and recommendations for security best practices and risk management framework (RMF) accreditation.
  • Drive application security and secure software development lifecycles, including containerization security as per NIST SP 800190.
  • Conduct hands-on security testing, analyze test results, and recommend countermeasures.
  • Provide guidance on cloud computing services, deployment architecture, and network management tools.
  • Review project requirements and assist in the development and tracking of project tasks and client deliverables.
  • Communicate with clients on project specific activities and manage project related deliverables.
  • Facilitate process working groups to analyze existing processes and create new business strategies.
 

Here's What You'll Need:

 

Requirements:

  • Bachelor's Degree in Security and Intelligence, or a related field.
  • Security+ CE, AWS Advanced Architect, and Splunk Fundamentals 1 and 2 certifications.
  • Extensive experience in information system security engineering, risk assessment, and vulnerability management.
  • Strong understanding of cloud computing services, secure software development lifecycles, and containerization security.
  • Proficient in creating and maintaining security documentation and Standard Operating Procedures (SOPs).
  • Demonstrated experience in leading technical exchange meetings, managing project deliverables, and ensuring compliance with security standards and policies.

Clearance Required:  

  • TS/SCI w/ poly

Apply for this role

Generate a tailored application kit with a matched cover letter, interview prep, and CV highlights — in under 60 seconds.

Apply Now →Generate Application Kit

Free account required — sign up in 30s

Company

Amentum

View company profile →