Principal Cyber Support Developer

General information

Requisition #

R70794

Locations

USA-VA-Chantilly

Posting Date

09/15/2026

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 is seeking a motivated, career- and customer-oriented Principal Cyber Support Developer to join our team in Chantilly, VA.

In this role, you will play a vital part in leading technical operations, executing cybersecurity engineering solutions, and safeguarding mission-critical enterprise systems.

Responsibilities include, but are not limited to:

• Utilize Linux and scripting experience to support and deploy Enterprise Cross Domain Solutions (CDS), enabling secure data transfers across network domains.
• Engineer and deploy capabilities to provide new functionality, improve system performance and availability, and generate efficiencies in operational environment maintenance.
• Support Assessment and Authorization (A&A) activities related to CDS technologies.
• Identify potential conflicts with the implementation of CDS technologies within the enterprise and develop actionable recommendations for remediation.
• Contribute to the successful completion of milestones associated with specific projects to meet customer requirements.
• Develop and enforce plans to safeguard computer files against unauthorized modification, destruction, or disclosure.
• Travel up to 25% annually to CONUS and OCONUS customer locations as required.

Basic Qualifications:

• Bachelor's Degree or 4+ years of additional direct experience in lieu of a degree.
• 7+ years of experience in systems engineering, cybersecurity operations, or software development.
• Proficiency in Linux systems administration and scripting.
• Demonstrated experience developing and maintaining Lua (LUA) scripts.
• Strong baseline understanding of networking concepts, including TCP/IP, firewalls, and routing protocols.
• Active DoD 8570/8140 IAT Level II certification (e.g., Security+ CE, GSEC, SSCP) or the explicit ability to obtain certification within 30 days of hire.

Preferred Qualifications:

• Deep understanding of cybersecurity architectural principles, including defense-in-depth, resilience, and integrated security operations.
• Hands-on experience designing, implementing, and managing database schemas.
• Demonstrated experience applying schema security-hardening practices, including access controls, input validation, least-privilege permissions, secure configuration, and vulnerability mitigation.
• Solid understanding of COTS CDS technologies listed on the NCDSMO Approved Products List (APL).
• Proven ability to apply security engineering principles to large-scale enterprise system designs.
• Familiarity with cloud computing concepts and virtualized networked environments.
• Experience with Information Assurance concepts and processes required to author documentation for Assessment and Authorization (A&A) frameworks.

Clearance Requirements:

• Must possess an active TS/SCI with polygraph.

Physical Requirements:

• Must be able to remain in a stationary position 50% of the time.
• Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine, and computer printer.
• Frequently communicates with co-workers, management, and customers; must be able to exchange accurate information in these situations, including delivering technical presentations.

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.