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# Principal Cyber Support Developer

- **Company:** Mantech International Corporation
- **Location:** Chantilly, VA, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Systems Engineering, Cloud Computing, Cyber Security, Computer Networks, Data Validation, Data Security, Database Schema, Linux, Linux System Administration, Lua (Scripting Language), Routing, Office Suite, Software Engineering, TCP/IP, Scripting, Firewalls (Computer Science)
- **Published:** October 10, 2026
- **Apply:** https://www.nettemps.com/us/en/W7AB32DE6FAE9092B31.ntap

## About the Role

* 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 (eg, Security+ CE, GSEC, SSCP) or the explicit ability to obtain certification within 30 days of hire., * 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.

## Description

* 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.