As an Information Systems Security Officer (ISSO), you will protect clients' sensitive data and systems. Key responsibilities include managing supply chain risks, designing and implementing solutions for Mandatory Least Privilege (MLS) requirements, overseeing software/hardware lifecycle enhancements, performing risk analyses, investigating security breaches, conducting penetration testing, establishing information assurance requirements, creating documentation for Authority to Operate (ATO) packages, supporting customers with policy implementation, and applying expertise to various systems. You will be instrumental in ensuring the security and integrity of systems, safeguarding national security interests.