Information System Security Officer (ISSO) Senior - Top Secret Clearance Required

Agile Defense, LLC; Quantico (VA); On-site; USD 110,000 - 170,000; Full time

Job summary

Agile Defense, LLC is seeking an experienced Information System Security Officer (ISSO) at the Senior level to support FBI programs from Quantico, VA. The ISSO will help develop and refine FBI IT system categorization methods based on security, operational, and mission factors.

The role requires RMF experience, strong governance and risk management skills, and coordination with multiple stakeholders in a complex, mission-driven environment.

Qualifications

• Experience in federal cybersecurity compliance and RMF.
• Ability to coordinate with stakeholders in a mission-driven environment.
• Knowledge of FIPS-199, NIST RMF, CNSS 1253 overlays.

Responsibilities

• Develop and maintain methodology to categorize FBI IT systems by security factors.
• Categorize by classification level, FBI division, NS s designation, FIPS-199 impact level, hosting location, CNSS 1253 overlays, data types, and mission function.
• Apply the methodology across assigned systems per task order timelines.
• Ensure methodology aligns with standards such as FIPS-199 and NIST RMF.

Skills

RMF knowledge

NIST RMF

Cybersecurity compliance

Stakeholder coordination

GRC tools

Tools

GRC tools

Job description

About Agile Defense

At Agile Defense we know that action defines the outcome and new challenges require new solutions. That's why we always look to the future and embrace change with an unmovable spirit and the courage to build for what comes next.

Our vision is to bring adaptive innovation to support our nation's most important missions through the seamless integration of advanced technologies, elite minds, and unparalleled agility-leveraging a foundation of speed, flexibility, and ingenuity to strengthen and protect our nation's vital interests.

Requisition #: 1928

Job Title: Information System Security Officer - Senior

Location: Quantico, VA

Clearance Level: TS with SCI eligibility required to start job

Required Certification(s): One of the following: CISM, CISSO, CISSP, CISSP-ISSMP, FITSP-M, GCIA, GCIH, GCSA, GICSP, or GSLC

Job Description

Agile Defense is seeking an experienced Information System Security Officer (ISSO) to support the FBI under Objective 2: ISSO/ISSE Program Management. The ISSO will support the development, implementation, and ongoing refinement of a methodology for categorizing and organizing FBI information technology systems based on security, operational, and mission-related factors.

This role will help ensure systems are consistently grouped according to attributes such as classification level, FIPS-199 categorization, hosting environment, CNSS 1253 overlays, data types, and business function. The ISSO will also support labor mapping, chargeback/cost recovery reporting, and documentation requirements associated with the call order.

The ideal candidate will bring experience in federal cybersecurity compliance, risk management, RMF, GRC tools, and stakeholder coordination in a complex, mission-driven environment.

Key Responsibilities

• Support development and maintenance of a documented methodology to categorize FBI IT systems based on:
• Classification level
• FBI division supported
• National Security System designation
• FIPS-199 impact level
• Hosting location (on-premises, Azure, AWS)
• CNSS 1253 overlays
• Data types managed
• Mission/business function
• Other evolving policy or operational criteria
• Apply the methodology across assigned systems in accordance with task order timelines.
• Ensure methodology aligns with applicable standards and guidance, including:
• FIPS-199
• NIST RMF and related NIST publications