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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior L3 Network Engineer - Cisco, Palo Alto, SD-WAN, Cloud & OT - **Company:** Stellent IT LLC - **Location:** Durham, NC, United States (Remote available) - **Experience:** Expert - **Contract:** Temporary to permanent - **Skills:** Amazon Web Services, Microsoft Azure, Border Gateway Protocol, Catalyst (Software), Cloud Computing, Data Centers, Enhanced Interior Gateway Routing Protocol, EtherChannel, Health Information Management, Supervisory Control and Data Acquisition (SCADA), Hot Standby Router Protocol, Integrated Development Environments, Virtual Private Networks (VPN), Multi-protocol Systems, Python (Programming Language), Network Security, Network Layer, Network Monitoring, Routing, Network Segmentation, Cisco Nexus Switches, Open Shortest Path First (OSPF), Ansible, Zero Trust Network Access, Wireshark, Virtual Local Area Networks, Wide Area Networks, Computer Networking Systems, Identity Services Engine, Google Cloud, Firewalls (Computer Science), Infrastructure Automation Frameworks, SolarWinds (Software), Network Support, Palo Alto Networks, Operational Systems, Routing & Switching, Terraform, Open Network Automation Platform, Splunk, Industrial Software, Cisco, Vmware - **Published:** September 4, 2026 - **Apply:** https://www.careerjet.com/jobad/usbf0df59492e5079cad16a14e1eb64f3c ## About the Role * Network Micro-Segmentation experience, including: * Cisco ISE * Security Group Tags (SGTs) * Private VLANs (PVLANs) * Network segmentation / Zero Trust * OT / Industrial Networking experience with environments containing: * PLCs * HMIs * SCADA * MES * Manufacturing systems * Strong BGP routing experience * Strong overall enterprise network engineering knowledge * Hands-on experience with Terraform and Ansible * Strong Cisco and Palo Alto experience * SD-WAN experience * Cloud networking experience, * Catalyst * Nexus * ISR * ASR * BGP * OSPF * EIGRP * MPLS * VLANs * STP * EtherChannel * HSRP * QoS Network Security * Palo Alto Strata * Palo Alto Panorama * GlobalProtect * NAT * Security Policies * Zero Trust * Network Micro-Segmentation * Cisco ISE * SGTs * PVLANs SD-WAN * Cisco SD-WAN / Viptela * Palo Alto Prisma SD-WAN Cloud Networking * Azure * AWS * GCP * ExpressRoute * Direct Connect * Cloud VPN * Transit Gateway * Virtual WAN OT / Industrial Networking * Operational Technology (OT) * Manufacturing Networks * SCADA * PLC * HMI * MES * Industrial Network Security Automation / Infrastructure as Code * Terraform * Ansible * Python * Network Automation * Infrastructure as Code Monitoring / Troubleshooting * Wireshark * SolarWinds * ThousandEyes * Splunk Experience * 10+ years of enterprise network engineering experience * Strong experience across: * Cisco * Palo Alto * SD-WAN * Cloud Networking * Network Security * Manufacturing / OT Networks Certifications Preferred: * CCNP * PCNSE ## Description Job Title: Senior L3 Network Engineer Cisco, Palo Alto, SD-WAN, Cloud & OT Location: Durham, NC (Hybrid Minimum 3 days onsite per week_ Local candidates) Duration: 12 months Interview Process: Face to Face interview Position Overview: The client is looking for a highly experienced Senior L3 Network Engineer to provide advanced network engineering and support across enterprise, data center, cloud, manufacturing, and Operational Technology (OT) environments. The ideal candidate will have strong hands-on experience with Cisco networking, Palo Alto firewalls, SD-WAN, cloud networking, network micro-segmentation, OT/industrial networks, BGP, Terraform, and Ansible. Must-Have Skills, Key Responsibilities: * Provide L3 network support across enterprise, data center, cloud, and manufacturing environments. * Design, deploy, and maintain Cisco routing and switching infrastructure. * Manage advanced routing protocols, including: * BGP * OSPF * EIGRP * MPLS * Route redistribution * Configure and support Layer 2/Layer 3 technologies, including: * VLANs * STP * EtherChannel * HSRP * QoS * Administer Palo Alto Strata Next-Generation Firewalls, Panorama, GlobalProtect, NAT, and security policies. * Implement Zero Trust, network segmentation, and IT/OT security controls. * Design, deploy, and support SD-WAN solutions, including: * Cisco SD-WAN / Viptela * Palo Alto Prisma SD-WAN * Support compute-related projects, including the VMware vSAN project in the U.S. domestic region. * Manage WAN connectivity across: * MPLS * Internet * DIA * VPN * Hybrid network environments * Design and support cloud networking across Azure, AWS, and GCP. * Implement and maintain: * Azure ExpressRoute * AWS Direct Connect * Cloud VPN * Transit Gateway * Virtual WAN * Support Operational Technology (OT) networks, including manufacturing, SCADA, PLC, and industrial systems. * Perform root cause analysis, problem management, and major incident resolution for network outages. * Develop network automation using: * Terraform * Ansible * Python * Infrastructure-as-Code practices * Monitor network performance, security, and availability using enterprise monitoring and security tools. * Create technical documentation and contribute to network modernization initiatives. * Collaborate with security, cloud, infrastructure, and other technology teams on strategic projects. Required Technical Skills: Networking * Cisco Routing & Switching, Description : You will be working on a team that is building a cloud-based development environment. 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