Information System Security Officer

MANTECH seeks a motivated, career and customer-oriented Information System Security Officer to support our contract under Marine Corps Systems Command (MCSC) out of Quantico, VA. The successful candidate will support the security compliance, and ongoing authorization of United Stated Marine Corps Systems.

Job Responsibilities include but are not limited to:

• This position will work closely with technical teams, security stakeholders, and authorizing agencies to protect information system assets, maintain compliance requirements, identify and mitigate cybersecurity risks, and support ongoing Authorization to Operate (ATO) activities.

• Prepare, review, and maintain security documentation including System Security Plans (SSPs), Risk Assessment Reports, Security Requirements Traceability Matrices (SRTMs), and authorization packages.

• Maintain the operational security posture of assigned information systems and ensure compliance with established security policies, standards, and procedures.

• Conduct and support Security Technical Implementation Guide (STIG) compliance reviews across infrastructure components including servers, network devices, operating systems, and applications.

• Assisting the Information System Security Manager (ISSM) with managing Plan of Action and Milestones (POA&Ms), ensuring the technical vulnerabilities are tracking, remediated, or mitigated with acceptable workarounds.

• Initiating corrective and protective security measures in coordination with the ISSM when threats or active Vulnerabilities are discovered. Assisting mthe ISSM in monitoring, reporting, and enforcing Information Assurance Vulnerability Management (IAVM).

• Collaborate with engineering and operational teams to resolve security findings and maintain compliance throughout the system lifecycle.

Mandatory Qualifications:

• Bachelor’s Degree and at least 6 years of related experience (additional 2 years of experience may be substituted in lieu of degree.