Senior Cyber Security Engineer
MantechVirginia, United States
Posted March 20, 2026
Full Time
About the Company
Mantech is a technology and services firm that partners with U.S. federal agencies, the military, and allied organizations to deliver secure, mission‑critical solutions. Leveraging more than 57 years of experience, the company specializes in cyber defense, intelligence and counter‑intelligence, systems engineering, enterprise IT, software development, data analytics, and C4ISR/C5ISR capabilities. With a workforce of nearly 9,800 employees—40 % veterans and many from intelligence and homeland‑security backgrounds—Mantech brings firsthand operational insight to every project. Its reputation for reliability, adaptability, and a deep commitment to public service makes it a trusted partner for complex, high‑stakes challenges across defense, healthcare, and environmental sectors.
Job Description
Join MANTECH as a Senior Cyber Security Engineer in Chantilly, VA, and contribute to designing, implementing, and maintaining secure and scalable systems and infrastructure. Help ensure performance, integrity, and protection across enterprise platforms.
Requirements
- Designing and maintaining complex enterprise systems and infrastructure that support strategic business objectives.
- Developing comprehensive system architecture and design documentation while maintaining a robust library of network diagrams.
- Collaborating with engineering and cybersecurity teams to ensure solutions meet security, performance, and scalability standards.
- Managing and configuring network devices and appliances, including Juniper, Cisco, and F5 platforms.
- Administering and troubleshooting Windows, Linux, and vendor appliance-based systems to ensure high availability.
- Planning and executing OS upgrades, patches, migrations, and system lifecycle tasks.
- Developing and maintaining disaster recovery strategies and proactive system monitoring mechanisms.
Benefits
- Generous Paid Time Off
- 401k Matching
- Retirement Plan
- Visa Sponsorship
- Four Day Work Week
- Generous Parental Leave
- Tuition Reimbursement
- Relocation Assistance