Principal Cyber Security Engineer

MANTECH
Chantilly, Loudoun County, VA

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

Responsibilities include but are not limited to:

  • Engineer, design, implement, integrate, and sustain Comply-to-Connect (C2C) deployment support to migrate, deploy, improve, and maintain C2C services.
  • Manage and maintain C2C appliances, applications, servers, and supporting infrastructure on unclassified and classified environments.
  • Coordinate with the network service provider to develop and maintain network architecture diagrams.
  • Evaluate and recommend changes and/or technology upgrades to address performance, standardization, and industry best practices.
  • Monitor and investigate C2C performance and faults and recommend system improvements.
  • Interact with team members and customers at multiple levels to gather, supply, or coordinate technical information.
  • Support Assessment and Authorization (A&A) activities related to cybersecurity technologies.

Minimum Qualifications:

  • Bachelor’s degree or 4+ years of additional experience in lieu of degree.
  • 7+ years of cyber engineering or relevant cybersecurity experience.
  • Experience with technologies involved in large-scale enterprise deployments and data centers.
  • Experience deploying and supporting enterprise security software products such as firewalls, IPS, Anti-Virus solutions, application firewalls, high availability solutions, network management systems, and virtual systems.
  • Solid knowledge of Windows and Linux systems, general operating system security practices, TCP/IP networking, 802.1x, and network security concepts.
  • Must hold an active IAT Level II certification (GSEC, Security+, SSCP, or CCNA-Security) or have the ability to obtain it within 6 months of hire.

Preferred Qualifications:

  • Experience implementing and using complex enterprise software products that involve multiple components.
  • Experience with vendor-agnostic C2C capabilities and services, open-source components and trends, DoD integration and networks, and DoD engineering and sustainment procedures.
  • Direct experience with Cisco Identity Services Engine (ISE).
  • Hands-on knowledge of Shell, Perl, and XML scripting.
  • Experience using security and diagnostic tools such as Nmap, Nessus, and tcpdump.

Clearance Requirements:

  • Must have a current and active TS/SCI with Polygraph.

Physical Requirements:

  • The person in this position must be able to remain in a stationary position 50% of the time.
  • The person in this position occasionally moves about inside the office to access file cabinets, office machinery, or to communicate with co-workers, management, and customers.

Posted 2026-08-12

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