Principal Cyber Support Developer with Security Clearance

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.