Senior Information Information Assurance/Security Engineer (ISSE)

Job Locations US-VA-Herndon
Requisition ID
Position Category
Cyber Security
Top Secret/SCI w/Poly
Space & Intelligence



Join Peraton as an Information System Security Engineer (ISSE) on our SITE III JIOC Contract


Role Overview:

As a key member of our SITE III JIOC team, you will be instrumental in enhancing the security posture of a diverse suite of applications supporting intelligence operations across Combatant Commands and Federal Agencies. This role focuses on orchestrating, sustaining, and evolving intelligence operations that directly support analysts, operations, and collection managers.


Key Responsibilities:

  • Develop and implement security solutions for network systems, ensuring compliance with cybersecurity requirements.
  • Support testing and validation in a test environment and manage security aspects in production environments.
  • Work closely with the ISSO on security analyses using SIEM tools, vulnerability assessments, and DISA STIG compliance.
  • Integrate security requirements using DevSecOps and SecOps methodologies throughout development processes.
  • Design and evaluate system-level ConMon requirements and implement best security practices.

What You Will Bring:

  • Proven experience in system security engineering and familiarity with cybersecurity frameworks.
  • Strong analytical skills with experience in SIEM tools like Splunk, vulnerability analysis, and risk assessments.
  • Ability to coordinate security activities and lead technical aspects of security audits.
  • Experience in developing and implementing technical solutions to enhance system security.

Why Peraton?

  • Work on critical defense intelligence systems with a multidisciplinary team.
  • Opportunity to apply best practices in architecture design, data science, cloud services, and platform integration.
  • Contribute to projects that have a direct impact on national security.

If you are ready to advance your career and work on high-impact projects that make a difference, apply now to join our expert team at Peraton.


Required Qualifications:

  • 10 years of experience that includes supporting Assessment and Authorization (A&A) and information assurance processes and documentation using RMF, BS degree; 8 years of experience with a masters; an additional 4 years of experience required in lieu of a degree (will consider at Staff level with the appropriate years of experience)
  • Experience working with software developers and architects to understand security requirements
  • Experience guiding application developers on security policy, identifying security requirements, providing technical guidance for the satisfaction of requirements
  • DISA STIGs and STIG Viewer experience
  • Hands-on experience in developing and validating control implementations and test procedures
  • Knowledge of current security risks and protocols
  • DoD Approved 8570 IA Technical (IAT)/IA Management (IAM) Level 2 Certification (e.g., Security+)
  • RMF, Xacta experience
  • Active TS clearance adjudication with the ability to obtain SCI and polygraph
  • Willing to work 100% onsite in a secure environment 

Desired Qualifications:

  • Experience working with AWS/Google cloud-hosted information systems or applications
  • Experience working with Redhat or CentOS Linux operating systems
  • Experience working in a DevSecOps environment and tool chain
  • Creating and using security tools and processes for scanning, testing, monitoring, and reporting
  • Experience in planning and overseeing configuration changes for major applications across multiple networks
  • Good analytic and problem-solving skills

Peraton offers enhanced benefits to employees working on this critical National Security program, which include heavily subsidized employee benefits coverage for you and your dependents, 25 days of PTO accrued annually up to a generous PTO cap and participation in an attractive bonus plan.

Peraton Overview

Peraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the world’s leading mission capability integrator and transformative enterprise IT provider, we deliver trusted, highly differentiated solutions and technologies to protect our nation and allies. Peraton operates at the critical nexus between traditional and nontraditional threats across all domains: land, sea, space, air, and cyberspace. The company serves as a valued partner to essential government agencies and supports every branch of the U.S. armed forces. Each day, our employees do the can’t be done by solving the most daunting challenges facing our customers. Visit to learn how we’re keeping people around the world safe and secure.

Target Salary Range

$146,000 - $234,000. This represents the typical salary range for this position based on experience and other factors.


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