Federal Information System Security Officer (ISSO)

Federal Information System Security Officer (ISSO)

Location: McLean, VA or Richmond, VA
Work Environment: Hybrid

Role Summary:
Exiger is seeking a mission-driven Federal Information System Security Officer (ISSO) to support the security, accreditation, and regulatory compliance efforts for our U.S. Public Sector business. This role will play a critical part in executing federal security programs, enabling government authorizations, and ensuring secure cloud architecture across civilian and defense environments.

This is a hands-on role focused on driving operational excellence across federal compliance programs while supporting Exiger’s continued growth within the federal marketplace.

What You’ll Do:

• Support the execution of Exiger’s federal information security and authorization strategy across civilian and defense environments
• Lead day-to-day activities associated with federal accreditation programs, including FedRAMP High, DoD CC SRG IL5/IL6, and agency-specific Authority to Operate (ATO) initiatives
• Develop, maintain, and update System Security Plans (SSPs), POA&Ms, and supporting documentation for federal compliance frameworks
• Ensure continuous monitoring, audit readiness, and regulatory reporting across all in-scope systems
• Build and maintain customer-ready security documentation and assurance packages to support federal procurement and oversight
• Partner with engineering, cloud infrastructure, and product teams to ensure security controls are properly implemented and maintained within system architectures
• Translate federal cybersecurity requirements (NIST, FISMA, CMMC, RMF) into actionable system-level controls and implementation guidance
• Coordinate with Authorizing Officials (AOs), agency security teams, and third-party assessment organizations (3PAOs) during authorization and audit processes
• Support automation efforts for compliance evidence collection, reporting, and risk management tracking
• Assist in security briefings and documentation to support federal customer engagements and delivery

What You Need:

• 5–10+ years of experience in federal cybersecurity, information assurance, or cloud compliance roles (ISSO, ISSE, or equivalent)
• Hands-on experience supporting ATO processes within federal environments, including RMF lifecycle activities
• Familiarity with FedRAMP and/or DoD IL5/IL6 requirements in cloud or SaaS environments
• Strong working knowledge of federal security frameworks including NIST 800-53, NIST 800-171, FISMA, and CMMC
• Experience developing and maintaining SSPs, POA&Ms, and other accreditation artifacts
• Experience working in AWS GovCloud, Azure Government, or similar regulated cloud environments
• Understanding of cloud security principles including identity and access management, encryption, vulnerability management, and logging/monitoring
• Ability to work cross-functionally with engineering, product, and compliance teams to implement and maintain security controls
• Strong organizational and communication skills, with the ability to manage multiple systems or programs simultaneously
• Active or ability to obtain and maintain a U.S. security clearance

Why You’ll Love Working at Exiger
At Exiger, we empower our teams to solve complex global challenges in partnership with some of the world’s most critical institutions.

We offer:

• High-performance culture rooted in accountability, collaboration, and a shared commitment to excellence
• Competitive base salary and performance-based incentives
• Equity participation opportunities
• Comprehensive medical, dental, and vision coverage
• 401(k) with company match
• Generous paid time off and company holidays
• Parental leave and family support programs
• Hybrid work environment fostering collaboration and flexibility

#Li-Hybrid