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

You will help design, implement, and maintain secure and scalable systems and infrastructure aligned to mission and business needs. Your role ensures performance, integrity, and protection across enterprise platforms while serving as a senior technical leader.

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

+ 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 trouble...