Information System Security Officer

Mantech seeks a motivated, career driven, and customer-focused Information System Security Officer (ISSO) to join our team in Columbia, Maryland.  You will play a critical role in supporting enterprise infrastructure capabilities for a global, mission-focused workforce. As an ISSO, you will work alongside customers, Integrated Product Teams (IPTs), and vendors to support the implementation and compliance of advanced EIT capabilities through Data Center & Compute Services. You will manage cybersecurity documentation, assess system vulnerabilities, and support the Risk Management Framework (RMF) lifecycle in alignment with Sponsor policies. Responsibilities include, but are not limited to:Update and maintain hardware and software inventory records, including associated change logsSupport and coordinate Secure the Enterprise (STE) and Secure the Network (STN) activitiesReview and address Xacta notices and ensure compliance documentation is accurate and currentComplete SEAR audit log records in accordance with Sponsor standardsTrack, review, and resolve POAMs (Plan of Action and Milestones) related to IAVA/IAVAx findingsDevelop and maintain System Security Plans (SSPs) for both new and existing systemsAnalyze vulnerability scan results and collaborate with system owners to implement remediationLeverage sponsor tools such as Gatekeeper, Xacta, SEAR, and LatteArt in daily operations Minimum Qualifications:Bachelor’s degree with 12+ years of relevant experience OR associate’s degree with 15 years of relevant experience OR high school diploma/GED with 20 years of relevant experienceExperience with Xacta, LatteArt and other sponsor toolsExperience managing POAMs, performing audit log reviews, and maintaining secure system inventoriesIAM I certification (DoD 8140 required upon start of employment.  Acceptable certifications include CAP/CND/Cloud+/GSLC/Security + CE/HCISSP/CASP+CE/CISM/CISSP/ or CCISO) Preferred Qualifications:Knowledge of STE and STN processes and coordinationExperience with Gatekeeper, SEAR, SCANBOYExperience with the Service Now (SNOW) platformClearance Requirements:Must possess and maintain a current/active TS/SCI clearance with Polygraph Physical Requirements:Must be able to remain in a stationary position 50% of the timeOccasionally moves about inside the office to access file cabinets, office machinery, etc.Frequently communicates with co-workers, management, and customers, including delivering presentations. Must be able to exchange accurate information in these situations