1699 - CTU 4 Network Engineer

Sigma Defense•San Diego, CA

1d•$125,000 - $145,000•Onsite

About The Position

Sigma Defense is seeking a CTU 4 Network Engineer to support our team in San Diego, CA. This role involves maintaining, configuring, and troubleshooting CTU 4 tactical hardware and associated network components, including system updates, patching, and configuration control. The position also requires supporting virtualization, enclave routing, cross-domain interfaces, and tactical data paths. Additionally, the engineer will provide direct technical support to shipboard ITs during Fleet training evolutions, conduct pier side and underway testing, and validate system readiness. Cybersecurity responsibilities include supporting RMF artifacts, STIG application, HBSS/ACAS compliance, vulnerability remediation, and ensuring CTU 4 components meet Navy cybersecurity and accreditation requirements, including Zero Trust-aligned hardening. The role also involves executing functional and performance tests, documenting findings, and supporting automated test development. Program integration and coordination with various stakeholders, as well as producing technical reports and system status updates, are key aspects of this position.

Requirements

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.
Must be a U.S. citizen.
DoD 8570 IAT Level II (Security +) certification.
CCNA/CCNP certification.
Experience with Linux (RHEL).
Experience with Windows Server.
Experience with Cisco IOS/NX-OS.
Experience with Juniper JUNOS.
Experience with Virtualization (VMware ESXi).
Must possess or have the ability to obtain an active Secret security clearance or higher.
Must hold an active Secret clearance to begin work.

Nice To Haves

Experience with automation development, scripting, or infrastructure-as-code (e.g. Ansible, Python).
Familiarity with DevSecOps principles and Zero Trust architectures.
Previous experience supporting CANES, ADNS, CTU4, Fleet training, or afloat training.
Experience with automation, CI/CD pipelines, testing frameworks, or DevSecOps toolchains.
Programming or scripting experience to include Python, Bash and or PowerShell.

Responsibilities

Maintain, configure, and troubleshoot CTU 4 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.
Provide direct technical support to shipboard ITs during Fleet training evolutions.
Conduct pier side and underway testing of CTU 4 components.
Validate system readiness prior to major Fleet exercises and deployment workups.
Support RMF artifacts, STIG application, HBSS/ACAS compliance, and vulnerability remediation.
Ensure CTU 4 components meet Navy cybersecurity and accreditation requirements.
Support Zero Trust–aligned hardening and secure configuration practices.
Execute functional and performance tests, regression tests, and interoperability assessments.
Document findings, track anomalies, and recommend corrective actions.
Support automated test development where feasible.
Coordinate with NIWC engineers, shipboard personnel, and TYCOM/Fleet stakeholders.
Align system updates with fleet schedules, maintenance windows, and CANES baselines.
Produce technical reports, configuration documentation, and system status updates.
Provide clear recommendations to leadership on system risks, readiness, and modernization needs.