Information Assurance/Security Specialist-Expert (ISSO)

We are seeking a highly skilled and mission-focused Information Assurance / Security Specialist (ISSO) to support cybersecurity compliance, Assessment & Authorization (A&A) activities, and Authority to Operate (ATO) documentation for designated systems. The ISSO will serve as a key liaison between contractor teams and federal certification authorities, ensuring security requirements are met, risks are communicated, and systems remain compliant with DOE, NNSA, and federal cybersecurity standards. This role requires strong technical acumen, exceptional documentation skills, and the ability to guide and advocate for contractor teams throughout the security lifecycle.