Senior Principal 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
MANTECH seeks a motivated, career and customer-oriented Senior Principal Cyber Security Engineer to join their team in Chantilly, VA, to design, implement, and maintain secure and scalable systems and infrastructure aligned to mission and business needs.
Requirements
- Designing, implementing, and maintaining complex enterprise systems and infrastructure
- Developing and maintaining comprehensive system architecture and design documentation
- Collaborating with engineering and cybersecurity teams to ensure solutions meet security, performance, and scalability standards
- Managing and configuring network devices and appliances
- Administering and troubleshooting Windows, Linux, and vendor appliance-based systems
- Planning and executing OS upgrades, patches, migrations, and system lifecycle tasks
- Implementing system monitoring, security event policies, and proactive response mechanisms