Information System Security Officer

General information

Requisition #

R70501

Locations

USA-CA-San Diego

Posting Date

09/02/2026

Security Clearance Required

Top Secret

Remote Type

Onsite

Time Type

Full time

Description & Requirements

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 join our team in San Diego, CA. This is an onsite position.

Responsibilities include but are not limited to:

• Maintain Assessment & Authorization (A&A) documentation in accordance with JSIG, NIST SP 800-37, and NIST SP 800-53, including SSPs, Contingency Plans, and Incident Response procedures

• Track compliance deficiencies using Plans of Action and Milestones (POA&M) through mitigation or risk acceptance, delivering quarterly status updates to the ISSM and SCA

• Implement and execute the Continuous Monitoring strategy to ensure ongoing compliance with authorization packages

• Oversee audit log collection systems and perform weekly reviews to maintain system integrity

• Manage hardware and software inventories, ensuring all deployed assets remain actively vendor-supported

• Maintain security tools, patch management processes, and vulnerability management programs in coordination with the Cybersecurity team

• Assess proposed system configuration changes as part of the Change Control Board (CCB) to evaluate security impacts

• Facilitate annual security awareness and role-based training, personnel account verification, and general ISSM support

Minimum Qualifications:

• Bachelor's degree preferably in IT, Cyber Security, Computer Science, Information Systems Management, Engineering, or similar field of study with 4+ years of information systems security experience, or an Associates degree with 6 additional years of relevant experience, or High School Diploma with 11+ years' experience in lieu of degree

• Security+ Certification

• 3+ years' experience with Risk Management Framework (RMF), ICD 503, NIST SP800-53, JSIG, or DJSIG

• Knowledge and experience with current authorization practices, specifically within the DoD

Preferred Qualifications:

• Masters degree preferably in IT, Cyber Security, Computer Science, Information Systems Management, Engineering, or similar field of study

• Experience with security efforts related to modern Windows, Cloud computing, Linux, UNIX, Cisco, SQL or Oracle databases, and virtual computing

• Experience implementing and using various Cyber Security tools including vulnerability assessment, patch management, audit collection, audit review, audit management, and end point protection

Clearance Requirements:

• Must have an active Top Secret clearance with the ability to obtain an SCI

Physical Requirements:

• The person in this position must be able to remain in a stationary position 50% of the time. Occasionally move about inside the office to access file cabinets, office machinery, or to communicate with co-workers, management, and customers, via email, phone, and or virtual communication, which may involve delivering presentations.

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 careers@mantech.com and provide your name and contact information.