Information Systems Security Engineer

General information Requisition # R67658 Locations USA-VA-Stafford Posting Date 05/12/2026 Security Clearance Required Top Secret Remote Type Onsite Time Type Full time Description & Requirements Shape the future of defense with MANTECH! Join a team dedicated to safeguarding our nation through advanced tech and innovative solutions. Since 1968, we've been a trusted partner to the Department of Defense, delivering cutting-edge projects that make a real impact. Dive into exciting opportunities in Cybersecurity, IT, Data Analytics and more. Propel your career forward and be part of something extraordinary. Your journey starts now—protect and innovate with MANTECH! MANTECH seeks a motivated, career and customer-oriented

INFORMATION SYSTEMS SECURITY ENGINEER

to join our team in

STAFFORD, VA.

Responsibilities include but are not limited to: Serve as the security engineering subject matter expert on development teams to influence system architecture and ensure security control integration. Install, configure, and maintain hardware and software to maximize system availability and monitor network performance. Validate and verify system security requirements definitions and analysis to establish and maintain system security baselines. Support security authorization activities in compliance with DoD RMF and

NIST RMF

processes for security engineering. Engineer and implement security-focused scripts and automation tools to streamline vulnerability management and compliance checks. Facilitate system accreditation efforts to secure ATO and IATT authorizations by coordinating control assessments and auditing compliance.

Minimum Qualifications:

Bachelor's degree and at least at least 4+ years of progressively responsible experience in Information Systems Security. A minimum of 7+ years' experience without a degree. Significant experience performing ISSE duties including influencing system architecture and integrating security controls within the SDLC Experience conducting vulnerability management using ACAS scanning, STIGs, and patching to ensure system integrity Proven experience navigating RMF processes and facilitating accreditation efforts for ATO and IATT authorizations Active DoD 8570/8140 Baseline Certification such as CASP+, CYSA+, or Security+

Preferred Qualifications:

Bachelor of Science in Information Systems Security or a related technical field Experience with cloud security platforms including AWS Cloud Practitioner and Azure Fundamentals certifications Advanced expertise in endpoint security applications such as Trend Micro, Carbon Black, or FireEye Experience leading Agile/Scrum sprints and utilizing Azure DevOps for task planning and backlog grooming

Clearance Requirements:

Must possess active Top Secret clearance and be able to obtain and maintain a TS/SCI and SAP clearance eligibility.

Physical Requirements:

Must be able and willing to perform occasional manual labor and warehouse duties, with the ability to lift up to 50 pounds. Must be able to remain in a stationary position 50% of the time. 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.