Senior Information Systems Security Officer (ISSO)
About the role
US Citizenship is required. This position requires a current TOP SECRET clearance. Candidate must be SAP program eligible. This position is in-person in our Arlington, VA office. Toyon Research Corporation is seeking a Senior ISSO to lead the full Risk Management Framework (RMF) lifecycle for assigned information systems, from security categorization through authorization and continuous monitoring. This is a hands-on, customer-facing role — the successful candidate will be comfortable wearing multiple hats, collaborating closely with a small team, and engaging directly with DoD CIO Security Control Assessors (SCAs) and internal stakeholders with a service-oriented mindset. The role carries responsibility for producing and maintaining RMF artifacts, coordinating remediation across system owners and engineering teams, and providing