1520 - Network Engineer I - III
- Salary
- $75,000 - $100,000 annually
- Level
- Junior
Not stated in the posting: work type, visa.
Open. First seen 3 October 2026.
About the role
Sigma Defense is seeking a Network Engineer I-III to support the design, implementation, and sustainment of the Navy’s enterprise networks. The hired candidate will design, configure, secure, automate, and document high-availability networks in both shipboard and lab environments while supporting the full lifecycle from installation through sustainment. This includes working on DoD initiatives such as SD-WAN, IPv6 Migration, Zero Trust Networks and Cross-Domain Network solutions.
They will work with SMEs in Cybersecurity, Systems Management, Systems Engineering, and Quality Assurance to learn the needs and goals of the system and shape the requirements of the network.
Sigma Defense's standard text
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.
Requirements
Network Engineer I:
- 0-2 Years of Experience.
- Knowledge of Network Access Control (Cisco ISE, Aruba ClearPass, FortiNAC, Forescout).
- Knowledge of Next-Gen Firewalls (Cisco Firepower, Palo Alto, Zscaler).
- Knowledge of Network Devices such as Switches, Routers, Wireless Controllers/APs, Proxy Servers, VOIP, and NTP services.
- Knowledge of deployment automation tools (Ansible, Python, PowerShell).
- Knowledge of delivering network artifacts such as IP plans, network templates, cable tables, network diagrams, ports/protocols documentation, and configuration guides.
- Security+ or CISSP and at least one industry certification (CCNA/DevNet Associate).
- Must be a U.S. citizen.
Network Engineer II:
- 3+ Years of Experience.
- Experience with Network Access Control (Cisco ISE, Aruba ClearPass, FortiNAC, Forescout).
- Experience with Next-Gen Firewalls (Cisco Firepower, Palo Alto, Zscaler).
- Experience with Network Devices such as Switches, Routers, Wireless Controllers/APs, Proxy Servers, VOIP, and NTP services.
- Experience with deployment automation tools (Ansible, Python, PowerShell).
- Experience with delivering network artifacts such as IP plans, network templates, cable tables, network diagrams, ports/protocols documentation, and configuration guides.
- Security+ or CISSP and at least one industry certification (CCNA/DevNet Associate).
- Must be a U.S. Citizen.
Network Engineer III:
- 7+ Years of Experience.
- Expertise with Network Access Control (Cisco ISE, Aruba ClearPass, FortiNAC, Forescout).
- Expertise with Next-Gen Firewalls (Cisco Firepower, Palo Alto, Zscaler).
- Expertise with Network Devices such as Switches, Routers, Wireless Controllers/APs, Proxy Servers, VOIP, and NTP services.
- Expertise with deployment automation tools (Ansible, Python, PowerShell).
- Expertise with delivering network artifacts such as IP plans, network templates, cable tables, network diagrams, ports/protocols documentation, and configuration guides.
- Security+ or CISSP and at least one industry certification (CCNP/DevNet Professional).
- Must be a U.S. Citizen.
Computer Software/Programs:
- Network Access Control
- Switching/Routing
- Firewall
- Deployment Automation
Personnel Clearance Level:
- Candidate must possess or have the ability to obtain an active Secret security clearance or higher.
- Clearance may be sponsored for the right candidate.
Education Requirements:
- Bachelor's or Technical Degree from an accredited college or university in an unspecified field of study.
Essential Job Duties (not all-inclusive):
- Configure, install, and maintain network equipment, software and services across Navy Enterprise Network architecture to include switching, routing, firewall, proxy, wireless, call managers, network access control, voice over IP, and network time services.
- Design, develop, implement, and troubleshoot VLANs, routing protocols, IP addressing plans, and WAN connectivity.
- Integrate external services including a wide variety of connected systems.
- Apply and validate network-related STIGs in coordination with cybersecurity personnel to ensure compliance with DoD security standards.
- Create, maintain, and update installation documentation, network diagrams, IP schemas, port mappings, and script/configurations for automated installations.
- Conduct diagnostics and fault isolation during official and unofficial test events as well as production installations.
- Collaborate with systems, software, and cybersecurity engineers to deliver secure and resilient network operations.
- Participate in shipboard testing, validation, and documentation.
Salary Ranges:
- Network Engineer I: $75,000 - $100,000 annually.
- Network Engineer II: $85,000 – $115,000 annually.
- Network Engineer III: $120,000 – $140,000 annually.
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
What this role asks for
Particular to this role
Ansible
Rare in Sigma Defense's other 33 open postings.
93% of this description is written for the role. The rest is Sigma Defense's standard text, folded away below.
Read against Sigma Defense's other open postings on this site.
The team: IMS (IMSENG, IMSPRG, IMSNM, IMST&R)
This role is one of 9 open in IMS (IMSENG, IMSPRG, IMSNM, IMST&R). 8 were posted in the last 30 days.
WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS
Cybersecurity (5 of 9), Python (5 of 9), Linux (4 of 9), Ansible (3 of 9), Cisco (3 of 9), PowerShell (3 of 9), VMware (3 of 9)
OTHER ROLES ON THIS TEAM
- 1655 - Senior Software Developer posted Oct 14
- 1742 - System Administrator posted Oct 14
- 1778 - Web Developer posted Oct 14
- 1699 - Network Engineer IV posted Oct 14
- 1760 - Application Developer posted Oct 14
- 1335 - Systems Engineer III posted Oct 14
- 1519 - Systems Engineer III posted Oct 13
- 1751 - Senior Systems Analyst: Training Technical Assessment SME posted Sep 15
From the team and dates on Sigma Defense's own job board.
Posting history
Reposted once since 18 March 2026: a posting for this role in San Diego was taken down and the role was posted again.
- 3 October 2026 – open (this posting)
- 18 March 2026 – closed 16 June 2026
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