Senior ISSE Engineer - TS/SCI Eligible, RMF Expert

Agile Defense, Inc.; Huntsville (AL); On-site; USD 140,000 - 155,000; Full time

Benefits offered by this job

Health Insurance

Life Insurance

Paid Time Off

Holiday Pay

Disability Insurance

Retirement plan

Learning and Development opportunities

Job summary

Agile Defense is seeking a seasoned Information System Security Engineer (ISSE) to support the FBI under Objective 2: ISSO/ISSE Program Management. You will categorize FBI IT systems by architecture, hosting, and mission requirements, and guide staffing and cost recovery through RMF-aligned analyses.

Responsibilities include evaluating system complexity, risk, and data sensitivity, while collaborating with ISSOs and leadership to ensure repeatable, well-documented categorizations and compliant

Qualifications

• Active Top Secret clearance required and experience assessing complex systems for security architecture, control implementation, and risk categorization.
• Strong knowledge of security standards (FIPS-199, NIST SP 800-37/800-53) and CNSS 1253; RMF familiarity.
• Experience with on-premises and cloud environments (Azure, AWS, or hybrid); ability to map findings to staffing and compliance requirements.

Responsibilities

• Design, maintain, and improve a methodology to categorize FBI IT systems by architecture, security posture, hosting, and mission requirements.
• Determine appropriate ISSO/ISSE support levels across traditional, hybrid, and cloud systems.
• Support RMF and system security engineering activities, including security architecture reviews and control implementation analysis.
• Translate technical attributes into labor mapping recommendations aligned to ITSSS categories and seniority; document decisions and rationale.

Skills

Active Top Secret clearance

Security architecture assessment

RMF

NIST SP 800-53

NIST SP 800-37

FIPS-199

CNSS 1253

Cloud and on-prem hosting

Strong communication skills

Education

Bachelor's degree in Information Security or related field

8+ years of experience substituted for education

Tools

GRC platforms

Job description

Agile Defense is seeking a seasoned Information System Security Engineer (ISSE) to support the FBI under Objective 2: ISSO/ISSE Program Management. You will categorize FBI IT systems by architecture, hosting, and mission requirements, and guide staffing and cost recovery through RMF-aligned analyses.

Responsibilities include evaluating system complexity, risk, and data sensitivity, while collaborating with ISSOs and leadership to ensure repeatable, well-documented categorizations and compliant