MANTECH seeks a motivated, career-driven, and customer-focused **Information System Security Officer (ISSO)** to join our team in **Laurel, MD** . You will play a critical role in supporting enterprise infrastructure capabilities for a global, mission-focused workforce. This position supports the high-visibility Enterprise Infrastructure Services (EIS) organization, responsible for the delivery and security of MPO’s Enterprise Information Technology (EIT)—the foundation for enterprise-wide services. 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:**

+ Leads medium to large complex projects and...