Senior Information Security Officer - RMF/A&A Expert

Amentum in Warrenton, VA is seeking a Senior Information System Security Officer to lead RMF-based A&A activities, develop security policies, and manage continuous monitoring across multiple systems. You will present executive briefings and coordinate risk assessments to maintain secure operations. The ideal candidate has an active Top-Secret clearance with SCI, 8 years of relevant experience, deep knowledge of Windows and RHEL, and hands-on experience with XACTA, Nessus, Splunk, and DISA STIGs.