Demo

Security Engineer/Architect (ISSE)

Reflexive Concepts
Fort Belvoir, VA Full Time
POSTED ON 12/4/2025 CLOSED ON 1/4/2026

What are the responsibilities and job description for the Security Engineer/Architect (ISSE) position at Reflexive Concepts?

Reflexive Concept is seeking a skilled Security Engineer/Architect to join our team!

Job Description

The candidate will be required to understand and document a systems design and implementation that encompass multiple enclaves, to include those with differing data protection/classification requirements. The candidate should understand distributed architectures and cloud-based systems for big data applications.

Essential Job Responsibilities

  • Will create, review and edit authorization documentation for completeness and accuracy in accordance with federal and DoD policy.
  • Thoroughly understand and be able to implement DoD RMF system accreditation processes.
  • Assess use case and operational risk of integrated open source, and GOTS/COTS software components.
  • Will use vulnerability management systems, automated security scanning tools, and system accreditation record systems.
  • Must be able to grasp new concepts, facilitate information exchanges for data gathering, and collaborate with diverse audiences.
  • Will follow established processes where applicable, and establish and execute defensible processes where none are prescribed.
  • Provide security planning, assessment, risk analysis, and risk management support.
  • Recommend system-level solutions to resolve security requirements and guide the development team in meeting the security posture requirements.
  • Support the Government in the enforcement of the design and implementation of trusted relationships among external systems and architectures.
  • Must apply existing knowledge of IA policy, procedures, and workforce structure to design, develop, and implement secure networking, computing, and enclave environments.
  • Must be able to interact well with others to complete work.
  • Other duties as assigned.

Minimum Qualifications

  • Security Clearance - A current TS/SCI level U.S. Government clearance with CI Poly is required; U.S. Citizenship required.
  • 9 years of experience as an ISSE or security-focused software / systems engineer with large multi-tiered programs and Bachelors in related field; OR 7 years relevant experience with Masters in related field; OR High School Diploma or equivalent and 13 years relevant experience.
  • Experience implementing DoD system accreditation processes (DIACAP acceptable and RMF preferred).
  • A deep understanding of systems engineering and an ability to quickly understand the inner workings of various software and system level applications.
  • DoD 8570 compliance with IAT Level II (SSCP, Security , CCNA-Security, or GSEC certification)
  • Experience with DISA STIGs and SRGs, vulnerability management systems, mitigation and compliance processes, and reviewing results from automated security scanning tools.
  • The ability to work independently and as part of a team is needed.
  • Work is hybrid role out of our customer site in Ft. Belvoir, VA. Must be willing to work on-site 2-3 days/week. Flexibility is essential to adapt to schedule changes as needed.

Preferred Requirements

  • CISSP-ISSEP is highly desired
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Salary.com Estimation for Security Engineer/Architect (ISSE) in Fort Belvoir, VA
$116,012 to $137,557
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