Senior Information System Security Officer

Company : ManTech International
Location : Washington, DC, 20022
Posted Date : 15 September 2025
Job Details
MANTECH seeks a motivated, career and customer-oriented Senior Information System Security Officer (ISSO) to join our team in Washington, DC .
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 and that selected security controls are implemented and operating as intended during all phases of the IS lifecycle
Provide liaison support between the system owner and other IS security personnel
Ensure that system security documentation is developed, maintained, reviewed, and updated on a continuous basis; Conduct required IS vulnerability scans according to risk assessment parameters
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; Working knowledge of the National Institute of Standards and Technology (NIST) Risk Management Framework (RMF) and ATO processes
Minimum Qualifications:
7+ years serving as an Information Systems Security Officer (ISSO) at a cleared facility; (5) Five years with a bachelors in comp sci, cybersecurity or related discipline or (3) three years with a master’s or advanced degree.
Must hold IAT L II/IAM L I certification such as a Security + CE.
Willing to obtain at least one of the following Information Assurance Management (IAM) Level III certifications within a specific timeframe: Certified Information Systems Security Professional (CISSP), Global Information Security Professional (GISP), or the CompTIA Advanced Security Practitioner (CASP) or equivalent certifications
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 be a US Citizen and have a current/active Top Secret clearance with SCI eligibility
Program may require CI 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.
ManTech International Corporation, as well as its subsidiaries proactively fulfills its role as an equal opportunity employer. We do not discriminate against any employee or applicant for employment. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.
If you are a qualified individual with a disability and require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please email us at and provide your name and contact information.
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