Information System Security Officer Security Clearance

Position: Information System Security Officer with Security Clearance
MANTECH seeks a motivated, career driven, and customer-focused Information System Security Officer (ISSO) to join our team in Columbia, MD. 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 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

Minimum Qualifications:

* Bachelor's degree with 10 years of relevant experience OR 4 additional years of ISSO experience may be substituted for the Bachelor's degree

* 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)

Preferred Qualifications:

* Knowledge of STE and STN processes and coordination

* Experience with Gatekeeper, SEAR, SCANBOY

* Experience with the Service Now (SNOW) platform Clearance 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 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.