Information Systems Security Officer (ISSO) with Security Clearance

Your Mission The MASY Group is a growing Nunn Perry award-winning government service company providing intelligence analysis, educational, and operational support to key federal agencies such as the Department of Defense and Intelligence Community. We are seeking a Information Systems Security Officer (ISSO) in support of the Defense Threat Reduction Agency. The successful candidate will support the ongoing development and sustainment of a cloud-ready platform , designed to deliver scalable, integrated NCBRE (Nuclear, Chemical, Biological, Radiological, and high-yield Explosives) modeling tools, data analytics, and decision support applications. Responsibilities: Lead and maintain compliance with DoD RMF processes and associated artifacts throughout the system development lifecycle (SDLC). Develop and manage System Security Plans (SSPs), POA&Ms, Security Assessment Reports (SARs), and other required documentation. Support and document all security-related activities to obtain and maintain Authorization to Operate (ATO). Conduct vulnerability assessments, coordinate security testing, and verify security controls are in place, effective, and monitored. Collaborate with development teams, system engineers, and stakeholders to ensure security is fully integrated into platform architecture and DevSecOps pipelines. Monitor compliance with security policies, identify risks, and recommend and implement mitigations. Qualifications: Bachelor's degree in Information Technology, Cybersecurity, Computer Science, or related field. Active Security+ certification (required); CISSP, CISM, or equivalent preferred. In-depth knowledge of NIST SP 800-53, NIST SP 800-37, and other RMF-related guidance. Experience with ATO packages, eMASS, and security toolsets (e.g., ACAS, HBSS, Nessus).