← All roles

Information System Security Engineer (ISSE) Senior - Top Secret Clearance Required

Agile Defense
Apply on company site
Washington, DC$140k - $155kRegularPosted 2w ago

About the role

Senior ISSE position supporting FBI under Objective 2: ISSO/ISSE Program Management, focusing on categorization methodology for FBI IT systems and RMF/compliance.

Responsibilities

  • Support design and maintenance of a methodology to categorize FBI IT systems based on: Architecture and technology stack; Security classification level; FIPS-199 impact level; National Security System designation; Hosting environment (on-premises, Azure, AWS); CNSS 1253 overlays; Data sensitivity and data types; Mission/business function; System complexity and integration dependencies
  • Assess system architecture, interfaces, hosting models, and security control implications to help determine appropriate ISSO/ISSE support levels
  • Analyze traditional, hybrid, and cloud-based systems to distinguish technical support requirements
  • Support accurate grouping of systems based on risk, operational impact, engineering effort, and compliance obligations
  • Translate technical system attributes into labor mapping recommendations aligned to ITSSS labor categories and seniority levels
  • Partner with ISSOs and program leadership to ensure categorization decisions are technically sound, repeatable, and well documented
  • Contribute to documentation supporting system assignments, engineering rationale, and support models
  • Support chargeback and cost recovery efforts by aligning technical support effort with system and division-level reporting
  • Assist with automated or semi-automated workflows used for categorization, reporting, and cost assignment
  • Support updates to reporting tools and technical logic when policy, technology, or organizational changes occur
  • Contribute to RMF and system security engineering activities, including: Security architecture reviews; Control implementation analysis; Inheritance considerations; Boundary analysis; System interconnection analysis; Technical documentation support
  • Review and apply NIST, CNSS, and FBI guidance to ensure methodology remains compliant and current; Support continuous improvement of the categorization framework as new technologies and requirements emerge.

Qualifications

  • Bachelor's degree in Information Security, Engineering, or related field
  • 8+ years of experience, or equivalent relevant work experience; e.g., each year of work experience may be substituted for each year of education required
  • One of the following: CCISO, CISA, CISM, CISSO, CISSP, CISSP-ISSEP, CPTE, CySA+, FITSP-A, GCSA, GSLC, or GSNA

Skills

Required:Active Top Secret clearanceSecurity architecture assessmentFIPS-199NIST SP 800-37NIST SP 800-53CNSS 1253RMFOn-premises and cloud environmentsSecurity documentationSystems analysisCommunication

Benefits

  • Health Insurance
  • Life Insurance
  • Paid Time Off
  • Holiday Pay
  • short-term and long-term Disability
  • Retirement and Learning and Development opportunities
  • other optional benefit elections
Last updated Oct 21, 2026. Interested? Apply on the company site.

About Agile Defense

Always Evolving

Agile Defense delivers advanced capabilities and solutions tailored to the most critical national security and civilian missions.

national securitycivilian missionsinnovationcapabilitiessolutions
Company profileWebsite

More open roles at Agile Defense