Information System Security Officer

Information System Security Officer

Shape the future of defense with MANTECH! Join a team dedicated to safeguarding our nation through advanced tech and innovative solutions. Since 1968, we've been a trusted partner to the Department of Defense, delivering cutting-edge projects that make a real impact. Dive into exciting opportunities in Cybersecurity, IT, Data Analytics and more. Propel your career forward and be part of something extraordinary. Your journey starts now—protect and innovate with MANTECH!

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:

• 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.
• Assist 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 the 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).
• Must be compliant and certified at the DoW 8140 intermediate level, thus will need a CASP, Security+, CISSP, or CISM certification.
• Knowledge of federal requirements: NIST SP 800-53, CNSSI 1253. FIPPS199 and FIPS 200, ECSM 018, etc.
• Demonstrates understanding of cybersecurity compliance frameworks, security controls, and system authorization processes.
• Strong understanding and experience of using Enterprise Mission Assurance Support Service (eMASS). i.e. importing, exporting, maintaining system packages through all steps of RMF.
• Experience supporting security audits, vulnerability assessments, and compliance activities.

Preferred Qualifications:

• Ability to effectively collaborate with technical teams, cybersecurity professionals, and government authorizing organizations. (translating the RMF security controls into practical technical configurations and system architecture designs)
• Comprehensive knowledge of enterprise information technology, cybersecurity, and information assurance principles, including data backup and recovery, system functionality, security controls, continuous monitoring, intrusion detection, penetration testing, and defense-in-depth strategies.
• Demonstrates ability to think critically, analyze complex information, identify potential issues, and develop effective solutions with minimal oversight.
• Experience assessing, documenting, and clearly communicating cybersecurity and compliance risks to both technical and non-technical stakeholders

Security Clearance Required:

• Must have a current / active Secret clearance

Physical Requirements:

• Sedentary work

The projected compensation range for this position is $104,200.00-$172,900.00. There are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories. In addition, MANTECH invests in its employees beyond just compensation. MANTECH's benefits offerings include, dependent upon position, Health Insurance, Life Insurance, Paid Time Off, Holiday Pay, short-term and long-term Disability, Retirement and Savings, Learning and Development opportunities, wellness programs as well as other optional benefit elections. MANTECH considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation. If you need a reasonable accommodation to apply for a position with MANTECH, please email us at and provide your name and contact information.