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Sigma Defense Systems LLC · 3 hours ago

1620 - C4I Systems/Network Engineer

San Diego, CA

Full-time

Onsite

Mid Level

$120K/yr - $140K/yr

3+ years exp

Sigma Defense Systems LLC is seeking a self-directed, highly motivated C4I Systems/Network Engineer to support the Automated Digital Network System (ADNS) program, which integrates hardware and software for the Navy's tactical IP routing and switching capability. The role involves providing technical expertise across Navy tactical networks, supporting network configurations, and ensuring reliable connectivity.

Software

No H1B

Security Clearance Required

U.S. Citizen Only

Responsibilities

Provides technical expertise across Navy tactical networks with emphasis on ADNS operations, Red Hat Enterprise Linux administration, and TACNET system support

Supports the configuration, troubleshooting, and sustainment of shipboard and shore-based network architectures

Ensures reliable multi-enclave connectivity across SATCOM and line of sight transport paths

Applies hands-on experience with routing, switching, enclave services, and system hardening

Collaborate with fleet operators, help desk personnel, and program stakeholders to maintain mission-ready communications capabilities

Qualification

Navy C4I systemsRed Hat Enterprise LinuxNetwork troubleshootingCompTIA Security+ CECCNA certificationMicrosoft Office SuiteFleet IT/ET/CT experienceDoD 8570 IAT Level IILinux certification

Required

3+ years supporting Navy C4I systems (ADNS, TACNET, CANES, or similar)

2+ years administering Red Hat Enterprise Linux in operational or enterprise environments

2+ years hands-on network troubleshooting (routing, switching, enclave connectivity)

Experience using Microsoft Office Suite

CompTIA Security+ CE

Must be a U.S. citizen

Bachelor's degree from an accredited college or university in computer science, information systems, software engineering, or a related technical field of study

Candidate must possess or have the ability to obtain an active Secret security clearance or higher

Preferred

Prior fleet IT/ET/CT experience or Navy help desk/Tier II-III support

DoD 8570 IAT Level II (Security+ certification)

Red Hat (RHCSA/RHCE) or equivalent Linux certification

CCNA or equivalent network certification

Benefits

Dental and Vision Insurance

Medical Insurance to Include HSA, FSA, and DFSA Plans

Life and AD&D coverage

Employee Assistance Program (EAP)

401(k) Plan with Company Matching Contributions

160 Hours of Paid Time Off (PTO)

12 (Floating) Holidays

Educational Assistance

Highly Competitive Salary

Company

Sigma Defense Systems LLC

Sigma Defense is a leading technology company serving the Department of Defense (DoD), specializing in solutions and services for CJADC2, C5ISR, Electronic Warfare and DevSecOps supporting customers in the Army, Navy, Air Force, Marine Corps, Space Force, and other government agencies.

Founded in 2006

Perry, Georgia, USA

501-1000 employees