Principal Cyber Security Engineer

General information

Requisition #

R69899

Locations

USA-VA-Chantilly

Posting Date

08/10/2026

Security Clearance Required

TS/SCI w/ Poly

Remote Type

Onsite

Time Type

Full time

Description & Requirements

Unlock the secrets of intelligence with MANTECH! Join a dynamic team at the forefront of national security, providing advanced solutions to government intelligence agencies. Since 1968, we've been solving the toughest challenges with groundbreaking tech. Explore thrilling projects in Digital Transformation, Cybersecurity, IT, Data Analytics and Software Development. Elevate your career and make a difference. Your adventure begins now-unleash your potential with MANTECH!

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.

The projected compensation range for this position is $141,500.00-$236,000.00. There are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories. In addition, MANTECH invests in its employees beyond just compensation. MANTECH's benefits offerings include, dependent upon position, Health Insurance, Life Insurance, Paid Time Off, Holiday Pay, short-term and long-term Disability, Retirement and Savings, Learning and Development opportunities, wellness programs as well as other optional benefit elections.

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.