Information System Security Engineer (ISSE) TS/SCI, on-site

Agile5 Technologies, Inc. • Washington, DC

10d • Onsite

About The Position

Agile5 Technologies is seeking a highly expert Information Systems Security Engineer (ISSE) – SME to lead the end-to-end implementation of the Security Assessment and Authorization (SAA) program and the NIST Risk Management Framework (RMF) lifecycle. This role involves supervising a team of security professionals across various FBI divisions to ensure that IT systems are categorized, secured, and authorized in alignment with Bureau risk appetite and federal mandates. The ideal candidate acts as a principal technical advisor, bridging the gap between complex security engineering and executive risk-based decision-making.

Requirements

• Active Top Secret / SCI (TS/SCI) clearance is required. Candidates must already possess this clearance and be prepared to support operations across multiple locations.
• 8+ years of prior relevant experience in Information Systems Security Engineering or Cybersecurity.
• Proven experience managing the end-to-end RMF lifecycle for federal or national security systems.
• Experience managing large technical teams (up to 80+ FTE) across geographically dispersed locations.
• Demonstrated history of supporting federal system Authorizations to Operate (ATO) within the last five years.
• Experience with FISMA audits, NIST standards, and DISA STIGs.
• Bachelor’s degree in Computer Science, Cybersecurity, or a related engineering field.

Nice To Haves

• DoD 8570 IASAE Level II or III certification (e.g., CISSP-ISSEP or CASP+)
• CISSP-ISSEP (Information Systems Security Engineering Professional)
• CISM (Certified Information Security Manager)
• CompTIA CASP+
• Certified Cloud Security Professional (CCSP)
• NIST Risk Management Framework (RMF) Certification

Responsibilities

• Lead and mentor a team of security professionals through the full RMF lifecycle (Prepare, Categorize, Select, Implement, Assess, Authorize, and Monitor).
• Oversee the implementation of technical, operational, and management security controls throughout system lifecycles, ensuring the quality and completeness of all deliverables.
• Direct enterprise-wide Information Systems Continuous Monitoring (ISCM) strategies to ensure sustained compliance and real-time risk visibility.
• Serve as a principal advisor on cybersecurity, providing expertise in risk analysis, incident response, system remediation, and audit support.
• Guide system categorization efforts based on mission impact and regulatory requirements to ensure appropriate safeguard selection.
• Plan and execute comprehensive security control assessments to validate the effectiveness of implemented safeguards.
• Prepare critical risk management documentation to facilitate system authorization (ATO) and executive-level decisions.
• Foster a culture of security awareness and stay current on NIST guidance, FISMA standards, and industry best practices.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Number of Employees: 11-50 employees