> Markdown version of [/jobs/ext/184814-l3-support-engineer](https://www.wearedevelopers.com/jobs/ext/184814-l3-support-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # L3 Support Engineer - **Company:** Reliance One, Inc. - **Location:** Buffalo, WV, United States - **Experience:** Experienced - **Salary:** $52,000.0 - $60,320.0 - **Contract:** Permanent contract - **Skills:** Cisco Routers, Data Centers, Dynamic Host Configuration Protocol, Domain Name System (DNS), Subnetting, Network Troubleshooting, Network Layer, System Center Configuration Manager, Windows Servers, Network Forensics, Print Servers, Routing, Packet Analyzer, Private Branch Exchange (PBX), TCP/IP, Wireshark, Virtual Local Area Networks, Wireless Networks, Computer Networking Systems, Software Troubleshooting, Information Technology, Network Server, Cisco - **Published:** May 23, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=5f907d6ab88df065 ## About the Role Do you have experience in Cisco routers/switches implementation?, Benefits begin on day 1 including medical, dental, vision insurance, 401(k), paid time off, and paid holidays We are hiring for one of our trusted clients seeking an experienced L3 Support Engineer to support complex IT infrastructure environments in a fast-paced manufacturing setting. This role is ideal for someone with strong technical troubleshooting experience, excellent customer service skills, and the ability to support critical infrastructure and plant floor systems., * 3-5 years of experience performing Level 3 IT support responsibilities * Strong Cisco networking experience required * Experience with TCP/IP, DHCP, subnetting, VLANs, and POE * Experience supporting Windows Server environments * Knowledge of data center/server room infrastructure and hardware support * Strong troubleshooting, root cause analysis, and critical thinking skills * Ability to work in high-pressure environments and support critical plant operations * Excellent communication and customer service skills * Project management experience within IT environments preferred * Flexibility to support on-call responsibilities and overtime as needed ## Description * Provide Level 3 technical support for infrastructure, server, network, and plant floor systems * Troubleshoot and resolve escalated incidents that cannot be resolved by Tier 1 support * Support Cisco Layer 2 and Layer 3 routing, wireless networks, and PBX administration * Perform network troubleshooting including TCP/IP, DHCP, VLANs, subnetting, and POE * Support IT cabling, switch configuration, infrastructure planning, and network traffic analysis * Utilize packet capture tools such as Wireshark for diagnostics and troubleshooting * Manage and support server room infrastructure including power, HVAC, fiber, switches, servers, and storage equipment * Administer Windows Server environments including DNS, DHCP, print servers, SCCM, and file shares * Support server, storage, SAN/NAS, and backup system maintenance and refresh activities * Provide technical support for plant floor systems including ANDON, PLC-related systems, GALC, PTCS, and manufacturing applications * Coordinate with remote teams and third-party vendors for issue escalation and resolution * Provide conference room, break/fix, and site support as needed * Respond to critical outages and plant floor emergencies with urgency and professionalism ## Related Videos - [How Cisco embraced a DevOps culture within its network engineering team](https://www.wearedevelopers.com/videos/99-how-cisco-embraced-a-devops-culture-within-its-network-engineering-team) - [An Applied Introduction to eBPF with Go](https://www.wearedevelopers.com/videos/1075-an-applied-introduction-to-ebpf-with-go) - [Creating a routing app with Google Maps API from scratch](https://www.wearedevelopers.com/videos/831-creating-a-routing-app-with-google-maps-api-from-scratch) - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [Computer Vision from the Edge to the Cloud done easy](https://www.wearedevelopers.com/videos/263-computer-vision-from-the-edge-to-the-cloud-done-easy) - [Turning Container security up to 11 with Capabilities](https://www.wearedevelopers.com/videos/718-turning-container-security-up-to-11-with-capabilities) ## Related Articles - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Where to Find Entry-Level Software Engineering Jobs](https://www.wearedevelopers.com/magazine/397-where-to-find-entry-level-software-engineering-jobs) - [Best Companies in the Netherlands: Top 25 Companies in 2023 ](https://www.wearedevelopers.com/magazine/193-best-companies-in-the-netherlands-top-25-companies-in-2023) - [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology) - [Best Companies to work for in London: Top 25 Companies in 2023](https://www.wearedevelopers.com/magazine/187-best-companies-to-work-for-in-london-top-25-companies-in-2023) - [Where To Find Software Engineering Jobs](https://www.wearedevelopers.com/magazine/396-where-to-find-software-engineering-jobs)