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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # L3 Network Support Engineer - **Company:** System One - **Location:** Annapolis, MD, United States - **Experience:** Experienced - **Contract:** Permanent contract - **Skills:** Active Directory, Amazon Web Services, Software Applications, Microsoft Azure, Bash Shell, Border Gateway Protocol, Spanning Tree Protocols, Cloud Computing, Configuration Management, CompTIA Security+, Computer Networks, System Configuration, Linux, DevOps, Elasticsearch, Enhanced Interior Gateway Routing Protocol, Monitoring of Systems, Internet Protocol Security (IP SEC), Intrusion Detection Systems, IP Routing, Virtual Private Networks (VPN), Multi-protocol Systems, Python (Programming Language), Network Security, Network Troubleshooting, Lightweight Directory Access Protocols (LDAP), Linux Servers, Logical Volume Manager, Multicasting, Nagios, Network Architecture, Routing, Network Administration, Network Management System, Open Shortest Path First (OSPF), Open Source Technology, OpenShift, OpenStack, Red Hat Enterprise Linux, Ansible, Prometheus, Simple Network Management Protocols, Virtual Local Area Networks, Virtual Router Redundancy Protocols, Alwayson, Datadog, Transport Layer Security, Data Storage Management, Google Cloud, Grafana, Juniper, Git Flow, Infrastructure Automation Frameworks, Information Technology, Deployment Automation, Network Support, Routing & Switching, Firewall Services Module, Terraform, Network Server, Cisco, User Accounts, Vmware - **Published:** September 25, 2026 - **Apply:** https://www.techcareers.com/job.asp?id=3404591926&tx=JT10496UHI&pt=1&aff=0B19D771-A501-4A5E-8338-2A822B784D54&utm_source=Job%20Feed&utm_medium=textkernel&utm_campaign=DE&utm_term=0B19D771-A501-4A5E-8338-2A822B784D54 ## About the Role * Bachelor's degree in a field related to IT, computer science, or telecommunications. * Juniper Engineer level certification in Routing and Switching (JNCIP) and Network Security (JNCIP-SEC). * Red Hat Certified Engineer (RHCE), and Red Hat Certified Specialist in Security certifications. * At least three years of senior-level experience in systems and network administration, ideally within a 24/7 operations or NOC environment, with demonstrable on-call and shift rotation experience in a mission-critical setting. * Proven experience in an ISP or carrier-grade networking environment. * Experience deploying and maintaining virtualized Linux servers (on-premises and cloud). * Experience designing and implementing secure, robust network architectures including VPNs, VLANs, and firewall configurations; hands-on experience with Cisco, Juniper, and open-source tools such as FRR routing. * Strong scripting and automation proficiency in Bash, Python, and Ansible. * Experience with Linux on virtualized platforms (OpenStack, OpenShift, VMware, Microsoft Azure), with strong expertise in Red Hat Enterprise Linux (RHEL), including Subscriptions, Licensing, IdM Server, and Satellite Server. * Experience configuring, troubleshooting, and hardening VMs and servers using Intrusion Detection Systems (IDS). * Hands-on experience with monitoring and observability stacks: Grafana, Prometheus, Loki, or Thanos. * Excellent written and oral English communication skills, including the ability to write clear incident reports and post-mortems. * Ability to remain composed and make sound decisions under pressure during critical incidents; strong professional relationship skills in a fast-paced, always-on environment. * Routing & Switching: Deep expertise in IP routing and switching, including MPLS, BGP, OSPF, EIGRP, RIP, Multicast, VLANs, Inter-VLANs, Spanning Tree, BFD, VXLAN, eVPN, IS-IS, and VRRP. * VPN & Security: Solid experience with IPSec VPNs, SSL VPNs, and advanced firewall configuration. * Network Troubleshooting: Strong ability to diagnose and resolve complex, time-sensitive networking issues efficiently. * Systems Administration: Installation, configuration, hardening, maintenance, and patching of network and server infrastructure; advanced troubleshooting in disk/storage management including LVM, RAW, XFS, EXT4, and BTRFS. * Monitoring & Observability: Configuring, troubleshooting, and managing systems including Grafana, Prometheus, Elasticsearch, and related tooling. * DevOps Practices: Familiarity with Git-based workflows and automated deployment strategies in production environments. * Cloud certification (Azure, AWS, or Google Cloud) and experience with Terraform or similar IaC tools for cloud provisioning. * Cybersecurity training and certification (e.g., CompTIA Security+, CISSP). * Experience contributing to DevOps or SRE frameworks, including CI/CD pipelines, infrastructure-as-code (Terraform, Ansible), and version-controlled configuration management. * Quality of Service (QoS) configuration on routers, switches, and firewalls. * Experience with network management tools (e.g., Nagios) and protocols (e.g., SNMP); expertise in authentication technologies, particularly Active Directory and LDAP. * Familiarity with ITIL or similar service management frameworks relevant to 24/7 operations. ## Description Based in Maryland, you will be a key member of a 24/7/365 operations team responsible for supporting highly available, mission-critical communications infrastructure. This role serves as a senior escalation point, ensuring the performance, reliability, and security of networking and IT systems, * Provide L3 technical support through Etherstack's 24/7/365 service desk, including on-call rotations and shift-based coverage; respond to, triage, escalate, and resolve incidents in accordance with defined SLAs. * Proactively monitor all IT systems, networks, and cloud infrastructure using observability tooling; identify and remediate issues before they impact operations. * Design, deploy, and maintain Etherstack's IT networks-including cloud-hosted environments-with a focus on resilience, redundancy, and security; augment infrastructure to support new projects and services. * Ensure IT systems meet security and compliance standards; plan and execute upgrades, patches, and hardening activities. * Maintain and administer user accounts, access controls, and application software licenses. * Conduct regular audits of IT systems and software; maintain an accurate, up-to-date asset register. * Document policies, procedures, infrastructure, and system configurations to a professional standard. * Analyze, test, and deploy software patches and updates in a controlled, risk-managed manner. * Provide technical guidance and mentorship to junior team members; contribute to knowledge base articles and training materials. ## 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) - [WebAssembly: The Next Frontier of Cloud Computing](https://www.wearedevelopers.com/videos/972-webassembly-the-next-frontier-of-cloud-computing) - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [Your Infrastructure Is Not a Playground: AI Agents for Infra Done Right](https://www.wearedevelopers.com/videos/2084-your-infrastructure-is-not-a-playground-ai-agents-for-infra-done-right) - [Generating code with Angular schematics](https://www.wearedevelopers.com/videos/129-generating-code-with-angular-schematics) - [Docker exec without Docker](https://www.wearedevelopers.com/videos/1094-docker-exec-without-docker) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [The Most Popular IT Jobs on the Market](https://www.wearedevelopers.com/magazine/376-the-most-popular-it-jobs-on-the-market) - [What Are The Top Skills Required For Azure Developers?](https://www.wearedevelopers.com/magazine/77-what-are-the-top-skills-required-for-azure-developers) - [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology)