Information Systems Security Officer (ISSO)

Your MissionTheMASY Groupis a growingNunn Perryaward-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).