Senior Information Systems Security Officer (Isso-S)

Senior Information Systems Security Officer (ISSO-S) Location: Fort Meade, MD This role requires an Active Top Secret/SCI with Polygraph and begins immediately. The position leads cybersecurity policy development, compliance efforts, and security oversight across the full system lifecycle. Responsibilities Develop and maintain security policies, procedures, and protocols. Ensure compliance with NIST SP 800-53, RMF, FISMA, JSIG, DAAPM; support and maintain ATO. Conduct risk assessments and vulnerability scans (ACAS, SCAP, STIGs); manage POA&Ms; oversee configuration and change control. Integrate security requirements into the SDLC; maintain SSPs and authorization documentation; manage systems in eMASS or equivalent. Coordinate incident response and reporting; monitor logs and network traffic; investigate breaches and recommend corrective actions. Advise system owners and stakeholders; collaborate with ISSMs, ISSEs, PMs, and AOs; deliver security awareness training. Requirements Active Top Secret/SCI with Polygraph. Bachelors degree in Computer Science, Cybersecurity, or related field. Senior-level experience supporting classified systems as an ISSO or similar role. Strong knowledge of RMF, NIST frameworks, and federal cybersecurity requirements. Experience with ACAS, SCAP, STIGs, configuration management, and eMASS. Metasys Technologies is an equal opportunity employer. All applicants will be considered for employment without attention to race, color, religion, sex, sexual orientation, gender identify, national origin, veteran or disability status.