General information Requisition # R70408 Locations USA-VA-Quantico Posting Date 08/31/2026 Security Clearance Required TS/SCI Remote Type Onsite Time Type Full time Description & Requirements Unlock the secrets of intelligence with MANTECH! Join a dynamic team at the forefront of national security, providing advanced solutions to government intelligence agencies. Since 1968, we've been solving the toughest challenges with groundbreaking tech. Explore thrilling projects in Digital Transformation, Cybersecurity, IT, Data Analytics and Software Development. Elevate your career and make a difference. Your adventure begins now—unleash your potential with MANTECH! •This is for a future opportunity•MANTECH seeks a motivated, career and customer-oriented Information System Security Officer (ISSO) to join our team in Quantico, VA. Responsibilities include, but are not limited to: Ensure the day-to-day implementation, oversight, continuous monitoring, and maintenance of the security configuration, practices, and procedures for each IS. Ensure that selected security controls are implemented and operating as intended during all phases of the IS lifecycle. Ensure that system security documentation is developed, maintained, reviewed, and updated on a continuous basis Provide liaison support between the system owner and other IS security personnel. Conduct required IS vulnerability scans according to risk assessment parameters. Develop Plan of Action and Milestones (POAMs) in response to reported security vulnerabilities Manage the risks to ISs and other FBI assets by coordinating appropriate correction or mitigation actions and oversee and track the timely completion of (POAMs). Coordinate system owner concurrence for correction or mitigation actions. Monitor security controls for FBI ISs to maintain security Authorized to Operate (ATO) Upload all security control evidence to the Governance, Risk, and Compliance (GRC) application to support security control implementation during the monitoring phase Ensure that changes to an FBI IS, its environment, and/or operational needs that may affect the authorization status are reported to the system owner and IS Security Manager (ISSM). Ensure the removal and retirement of ISs being decommissioned in coordination with the system owner,

ISSM, and ISSR Minimum Qualifications:

Must meet one of the following levels of experience: A high school diploma/GED and 5 years' experience, a bachelor's degree in computer science, cybersecurity or a related discipline and three years' experience, or a master's degree in computer science, cybersecurity or a related discipline and 1 years' experience. Possession of one or more relevant industry certifications such as: SecurityX / CASP+, CCISO, CGRC/CAP, CISA, CISM, CISSO, CISSP, CISSP-ISSEP, Cloud+, CySA+, FITSP-A, GCSA, GSEC, GSLC, GSNA, PenTest+, Security+, CCNP Enterprise, GMON, CCSP, CISSP-ISSAP, CSSLP, FITSP-D, GCIA, GDSA, or GICSP. Familiarity with the use and operation of security tools including Tenable Nessus and/or Security Center, IBM Guardium, HP Weblnspect, Network Mapper (NMAP), and/or similar applications

Preferred Qualifications:

A bachelor's or advanced degree in Computer Science, Cybersecurity, or other cyber discipline

Clearance Requirements:

Must have a current/active Top Secret security clearance with SCI Eligibility. Selected candidate must be willing to undergo a Polygraph.

Physical Requirements:

Must be able to remain in a stationary position 50% Needs to occasionally move about inside the office to access file cabinets, office machinery, etc. Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine and computer printer Often positions self to maintain computers in the lab, including under the desks and in the server closet Frequently communicates with co-workers, management and customers, which may involve delivering presentations. Must be able to exchange accurate information in these situations The projected compensation range for this position is $91,600.00-$153,800.00. 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.