**MANTECH** seeks a motivated, career and customer-oriented **Security Engineer** to join our team in **Springfield, VA.**

This position will serve as the Assessment & Authorization (A&A) authority for the NGA MC&G CPSTN Digital Twin Pilot effort. You will work closely with the Technical Program Manager (TPM) and DevOps teams to design, implement, and maintain a robust security posture protecting a high-fidelity digital twin environment.

**Responsibilities include but are not limited to:**

+ Leading the compilation, organization, and technical writing of the complete Body of Evidence (BOE) required to successfully navigate the ICD 503 Risk Management Framework (RMF) pipeline for IATT and ATO milestones.
+ Utilizing automated RMF tools such as Telos XACTA to document, track, and map NIST SP 800-53 and CNSSI 1253 security controls within an IL6 cloud environment.
+ Reviewing and hardening automated deployment scripts (e.g., Ansible, Terraform) to ensu...