Information System Security Officer

Information System Security Officer (ISSO)

San Antonio, TX

Join to apply for the Information System Security Officer role at MANTECH. Mantech seeks a motivated, career driven, and customer-focused Information System Security Officer (ISSO) to join our team in San Antonio, TX. 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.

• Update and maintain hardware and software inventory records, including associated change logs.
• Support and coordinate Secure the Enterprise (STE) and Secure the Network (STN) activities.
• Review and address Xacta notices and ensure compliance documentation is accurate and current.
• Complete SEAR audit log records in accordance with Sponsor standards.
• Track, review, and resolve POAMs (Plan of Action and Milestones) related to IAVA/IAVAx findings.
• Develop and maintain System Security Plans (SSPs) for both new and existing systems.
• Analyze vulnerability scan results and collaborate with system owners to implement remediation.
• Leverage sponsor tools such as Gatekeeper, Xacta, SEAR, and Latte Art in daily operations.

• 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 experience.
• Experience with Xacta, Latte Art and other sponsor tools.
• Experience managing POAMs, performing audit log reviews, and maintaining secure system inventories.
• IAM 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.

• Knowledge of STE and STN processes and coordination.
• Experience with Gatekeeper, SEAR, SCANBOY.
• Experience with the Service Now (SNOW) platform.

• Must possess and maintain a current/active TS/SCI clearance with Polygraph.

• Must be able to remain in a stationary position 50% of the time.
• Occasionally 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.

Mid-Senior level

Full-time

Information Technology

IT System Data Services