Information Security System Engineer

### Information Security System Engineer
** Role:
** Information Systems Security Engineer (ISSE)  
*
* Location:

** Fairfax, VA or Greenwood Village, CO  
** Clearance:
Active TS/SCI with CI Polygraph Required*
* ** Compensation:** $150,000 - $220,000 Base Salary + 50% Additional Employer-Funded Compensation
** Total Package Value:
Up to $330,000
**** Benefits
* * Employer-funded 401(k) contribution worth 25% of base salary  Flexible benefits allowance worth 25% of base salary (can be taken as benefits or additional compensation)  Up to 8 weeks PTO  Medical, Dental & Vision coverage  Life Insurance  100% tuition reimbursement (Degrees, Certifications & Professional Development)  Flexible working hours  Long-term, mission-critical programs supporting the US Intelligence Community      
** The Opportunity
** We're supporting a highly respected technology organization delivering advanced solutions across the US Intelligence Community and National Security sector.

As an Information Systems Security Engineer (ISSE), you'll serve as the critical link between cybersecurity compliance requirements and technical implementation. Working alongside program leadership, engineers and development teams, you'll play a key role in ensuring complex mission systems meet stringent security and accreditation requirements while supporting ongoing operational and development activities.

This is a highly visible position offering exposure to large-scale Linux environments, cybersecurity engineering, Risk Management Framework (RMF) processes and enterprise security architecture within some of the most security-conscious environments in government.
** What You'll Be Doing
*** Leading and supporting ICD-503 Risk Management Framework (RMF) activities
* Preparing and maintaining accreditation and Assessment & Authorization (A&A) documentation
* Developing security plans, contingency plans, incident response plans and risk management documentation
* Supporting continuous monitoring, vulnerability management and compliance initiatives
* Working closely with developers, engineers and program stakeholders to implement security controls
* Reviewing and assessing system architectures to ensure compliance with security requirements
* Supporting vulnerability scanning, remediation and audit activities
* Providing cybersecurity guidance throughout the system lifecycle
* Supporting Linux-based enterprise environments and security operations
** What We're Looking For
*** Experience supporting Intelligence Community or DoD cybersecurity programs
* Strong understanding of ICD-503 and Assessment & Authorization (A&A) processes
* Experience developing and maintaining RMF security documentation
* Experience supporting vulnerability management and continuous monitoring programs
* Experience with NESSUS, NMAP, Trivy, Service Now or similar security and compliance tools
* Strong Linux systems administration or engineering experience
* Experience evaluating security architectures and technical solutions
* Security+ or CISSP certification
* Excellent communication and stakeholder management skills
** Desirable Experience
*** Red Hat Enterprise Linux administration
* Kubernetes environments
* Puppet, Ansible or other automation tools
* AWS or cloud technologies
* VMware environments
* CCNA or equivalent networking experience
* Git, Git Lab or other source control platforms
* Enterprise monitoring and logging platforms
* Oracle, MySQL or other relational databases
* Cross Domain Solutions (CDS) technologies
* Linux scripting using Bash, Python or similar languages
** Applicants must hold an active TS/SCI clearance with CI Polygraph.
**** Keywords
* * ISSE, Information Systems Security Engineer, Information Assurance, Information Security, Cyber Security Engineer, RMF, ICD-503, A&A, Assessment and Authorization, NIST 800-37, Security Engineer, Linux Engineer, Red Hat, Kubernetes, CISSP, Security+, NESSUS, NMAP, Trivy, Service Now, AWS, VMware, TS/SCI, CI Polygraph, Intelligence Community, Defense, Government Contracting.

Location:

Fairfax, Virginia | Salary: $150000 - $220000 per year | Job type:
Permanent| Posted: 16/06/2026