SRE Transport – VPN/Firewall

Leidos currently has an opening on the ‘Service Management, Integration and Transport’ (SMIT) Contract for a Firewall, VPN (Virtual Private Network) & DMZ (Demilitarized Zone) Network Engineer located in Norfolk, SDNI, PRLH, etc. Join our team to support the SMIT mission, the largest IT services program for the United States Navy. As part of the Leidos team, you will play a pivotal role in delivering the Navy-Marine Corps Intranet (NMCI) to customers around the globe. We are seeking a skilled Firewall & VPN Network Engineer proficient in network engineering appliances and technologies (i.e., Firewalls, DMZ, VPN) to join our Transport Operations team. In this role, you will be responsible for designing, implementing, and maintaining robust & mature global network security solutions.

Your expertise in configuring enterprise-grade Juniper firewalls, managing DMZ environments, engineering secure Firewall/VPN solutions, and administering Cisco network appliances will be crucial. You will collaborate closely with cross-functional engineering and project management teams to safeguard our network infrastructure against threats and vulnerabilities, ensuring the highest levels of operational integrity. You will be a member of a technical team, managing customer relationships and overseeing key resources for Incident Response, Change Management, Problem Management, Operations and Maintenance (O&M), and ITSM and DevSecOps initiatives.

Primary Responsibilities

• Support Current Operations for the United States Navy by providing VPN, DMZ, and Firewall Network Engineering Subject Matter Expertise (SME) for the largest Intranet in the world. A qualified candidate for this position would be responsible for network modification, operation, integration, maintenance, security, and implementation of services for the as-fielded NMCI network.
• Collaborate with the Network Operations Center, Network Administrators, and the Network Engineering Team to define and/or continuously improve:Network Security Appliances (i.e., DMZ, VPN, Firewalls)Test and Validate Automation and best practice insertion opportunities.Lead development of Network SOPs/TTPsContinuous Service Improvements (CSI)System performance tuning and enhancementsCreate and maintain Engineering Implementation Plans (EIP)
• Plan and execute network upgrades and maintenance activities with the NMCI Operations Manager, NOC Lead, Release Management team, and other key stakeholders.
• Tier III escalation support and vendor engagement supporting Incident Management activities.
• Active participation in Root Cause Analysis for Problem Management activities.

You'll Bring These Qualifications

• Requires B.S. Degree and 8–12 years of prior relevant experience. Work experience may be substituted for degree at Hiring Manager’s discretion.
• U.S. Citizen with an active DoD Secret security clearance.
• Must currently possess an active DoD 8570.01 IAT Level III Certification, i.e., CCNP Security, CISSP, or CASP+.
• Must currently possess an active Associate level Network Vendor Certification (from one of the following Vendors): Cisco, Juniper, Palo, F5 Networks.
• Ability to work or be called in to work during off-hours to meet customer mission support requirements.
• Participate in on-call rotation for Incident Management responsibilities among the Transport Operations team.
• Network Subject Matter Expert for operations providing Tier-III support to the NOC watch staff.
• Perform highly technical maintenance and configuration to firewalls, VPNs, and DMZ appliances.
• Extensive experience engineering and troubleshooting networks, including routing, switching, MPLS, VPNs, routing protocols (i.e., BGP, OSPF, IS-IS), switching protocols (i.e., Spanning Tree Protocol, VLANs, LLDP, VoIP), Multicast protocols, and emerging network technologies.
• Strong understanding and in-depth knowledge of IP network/subnet addressing.
• Extensive knowledge of defense-in-depth principles, Network architecture, Modern Network Topologies, Network appliance integrity, and common networking security elements.
• Ansible, Python, IaC network automation experience.

At Leidos

At Leidos, we don’t want someone who "fits the mold"—we want someone who melts it down and builds something better. This is a role for the restless, the over-caffeinated, the ones who ask, “what’s next?” before the dust settles on “what’s now.”

NGEN

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting:

November 9, 2026

Pay Range:

Pay Range $87,100.00 - $157,450.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.