Network Engineer IV

Sigma Defense is seeking a Network Engineer IV to support our team in San Diego, CA.

The Network Engineer delivers advanced afloat C4

ISR network engineering, integration, and sustainment for the Navy's carrier training tactical system - a ruggedized component of the CANES architecture used across Fleet units. The role ensures reliable tactical data transport, system interoperability, and secure network performance during Fleet training events and readiness exercises. The engineer supports NIWC Pacific and shipboard ITs by maintaining, configuring, troubleshooting, and modernizing Network hardware and software baselines.

Position at the intersection of fleet training and afloat network readiness, the role provides hands‑on technical leadership and direct support to operations units preparing for deployment.

Equal Opportunity Employer/Veterans/Disabled:
Sigma Defense Systems is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability.

• 3 - 5 years of network engineering experience.
• Strong network engineering and troubleshooting skills.
• Familiarity with Navy tactical networks and enclaves (NIPR/SIPR/CANES)
• Ability to operate across shipboard, NIWC, and TYCOM stakeholders
• Clear and effective communication with shipboard ITs and leadership
• Ability to support occasional underway periods or pier side testing.
• Experience with automation development, scripting, or infrastructure-as-code (e.g. Ansible, Python) is preferred.
• Familiarity with Dev Sec Ops  principles and Zero Trust architectures is preferred.
• Must be a U.S. citizen

• Previous experience supporting CANES, ADNS, Carrier Training Units, Fleet training, or afloat training.
• Experience with automation, CI/CD pipelines, testing frameworks, or Dev Sec Ops  tool chains
• Programming or scripting experience to include Python, Bash and or Power Shell

• DoD 8570 IAT Level II (Security +)
• CCNA/CCNP

• Linux (RHEL)
• Windows Server
• Cisco IOS/NX-OS
• Juniper JUNOS
• Virtualization (VMware ESXi)

• Candidate must possess or have the ability to obtain an active Secret security clearance or higher
• Clearance may be sponsored for the right candidate
• Candidate must hold an active Secret clearance to begin work.
• A TS/SCI clearance level is preferred but not required.

• Bachelor's degree from an accredited college or university in Network Engineering, Computer Science, or related field of study

• Network Engineering & System Sustainment:
  • Maintain, configure, and troubleshoot carrier training tactical hardware and associated network components
  • Perform system updates, patching, baseline management, and configuration control
  • Support virtualization, enclave routing, cross domain interfaces, and tactical data paths
• Afloat Integration & Technical Support:
  • Provide direct technical support to shipboard ITs during Fleet training evolutions
  • Conduct pier side and underway testing of Carrier Training Units
  • Validate system readiness prior to major Fleet exercises and deployment workups
• Cybersecurity & Compliance:
  • Support RMF artifacts, STIG application, HBSS/ACAS compliance, and vulnerability remediation
  • Ensure Carrier Training Units meet Navy cybersecurity and accreditation requirements
  • Support Zero Trust-aligned hardening and secure configuration practices
• System Testing & Evaluation:
  • Execute functional and performance tests, regression tests, and interoperability assessments
  • Document findings, track anomalies, and…