Security Engineer

General information Requisition # R68852 Locations USA-VA-Springfield Posting Date 06/22/2026 Security Clearance Required TS/SCI Remote Type Onsite Time Type Full time Description & Requirements Unlock the secrets of intelligence with MANTECH! Join a dynamic team at the forefront of national security, providing advanced solutions to government intelligence agencies. Since 1968, we've been solving the toughest challenges with groundbreaking tech. Explore thrilling projects in Digital Transformation, Cybersecurity, IT, Data Analytics and Software Development. Elevate your career and make a difference. Your adventure begins now—unleash your potential with MANTECH! •This is for a future opportunity•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 ensure hardware abstraction models and virtual environments are provisioned securely. Deploying and managing automated scanning tools—including ACAS (Nessus), SCAP Compliance Checker (SCC), and static code analysis tools—to identify and remediate system vulnerabilities. Auditing and securing containerized environments and service mesh configurations to guarantee data isolation, secure transit, and continuous monitoring compliance. Serving as the primary technical interface to NGA Information System Security Officers (ISSOs) and Authorizing Officials (AOs) to clear security roadblocks. Working with all stakeholders to ensure the Drift Management Capability securely monitors and maintains parity between the digital twin and the live

NGA CORE

classified production environment.

Minimum Qualifications:

High School Diploma/GED with 10+ years of experience, or a Bachelor's degree in Cybersecurity, Systems Engineering, or a related technical field with 6-10 years of progressive experience. 3+ years of direct experience supporting DoD or Intelligence Community (IC) RMF processes. Proven experience securing hybrid cloud environments and infrastructure utilizing Ansible or

QEMU-KVM

architectures. Direct experience delivering a system from initial registration through

IATT/ATO

approvals within an IC or DoD classified boundary. Strong knowledge of cybersecurity frameworks including

ICD 503, NIST SP 800-53, CNSSI

1253, and DISA STIGs.

Preferred Qualifications:

Certified Information Systems Security Professional (CISSP), CISSP-ISSEP, CISM, or CAP certification. Deep familiarity with NGA networks, NGA mission threads, and specific security accreditation processes. Self-starter with excellent people skills who can embed security compliance into rapid prototyping or iterative DevSecOps sprint cycles and drive change throughout an organization.

Clearance Requirements:

Must possess an active TS/SCI clearance and be eligible for NGA access prior to starting

Physical Requirements:

Must be able to remain in a stationary position 50% of the time. Needs to occasionally move about inside the office to access file cabinets, office machinery, etc. Frequently communicates with co-workers, management, and customers, which may involve delivering high-level technical presentations to executive stakeholders. Must be able to exchange accurate information in these situations. MANTECH considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation. If you need a reasonable accommodation to apply for a position with MANTECH, please email us at careers@mantech.com and provide your name and contact information.