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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Network Engineer - **Company:** IT1 Limited Liability Company - **Location:** United States (Remote available) - **Experience:** Expert - **Salary:** $125,000.0 - $140,000.0 - **Contract:** Permanent contract - **Skills:** Artificial Intelligence, Amazon Web Services, User Authentication, Microsoft Azure, Backup Devices, Border Gateway Protocol, Spanning Tree Protocols, Catalyst (Software), Cisco PIX, Codecs, Network Congestion, Data Centers, Dynamic Host Configuration Protocol, Domain Name System (DNS), Enhanced Interior Gateway Routing Protocol, Firmware, Virtual Private Networks (VPN), Local Area Networks, Network Security, Network Installation Services, Routing, Network Segmentation, Cisco Nexus Switches, Open Shortest Path First (OSPF), Remote Access Technology, Roaming, Runbook, Smart Devices, Virtual Local Area Networks, Wide Area Networks, Cisco WebEx, Network Routers, Integrated Service Routers, Network Access Control, Load Balancing, System Availability, Firewalls (Computer Science), Information Technology, Low Latency, SolarWinds (Software), Palo Alto Networks, Firepower, Cisco Switches, Cisco - **Published:** October 19, 2026 - **Apply:** https://www.builtincolorado.com/job/senior-network-engineer/11780342?handler=ApplyRedirect ## About the Role * Senior-level experience supporting large, distributed enterprise or public-sector network environments in a managed-services, NOC, infrastructure operations, or similar operational model. * Demonstrated advanced troubleshooting across routing, switching, firewalls, VPN, wireless, SD-WAN, network segmentation, QoS, high availability, and network performance. * Hands-on expertise with Cisco enterprise networking, including Catalyst, Nexus, ISR/ASR/Catalyst 8000, ACI/APIC, routing protocols such as BGP, OSPF, and EIGRP, and switching protocols such as Spanning Tree. * Experience with Palo Alto, Cisco ASA/Firepower, and Meraki security or SD-WAN platforms. * Experience with enterprise wireless controllers and access points, RF health indicators, authentication, roaming, interference analysis, capacity, coverage, and firmware lifecycle support. * Ability to troubleshoot latency, jitter, packet loss, bandwidth saturation, interface errors, adjacency failures, tunnel health, route selection, failover, and cross-provider connectivity conditions. * Experience with carrier and vendor case management, including evidence collection, coordinated testing, escalation tracking, stakeholder communication, restoration validation, and closure documentation. * Familiarity with voice and UC infrastructure, including SIP, SBCs, gateways, Direct Routing, call setup, signaling, media paths, codec negotiation, call-quality indicators, and carrier trunks. * Ability to use monitoring and management platforms, interpret telemetry and logs, correlate alarms, identify actionable conditions, and distinguish local, overlay, carrier, platform, and application-related causes. * Working knowledge of ITIL-aligned incident, problem, change, configuration, capacity, knowledge, and vendor-management practices. * Strong technical writing skills for diagrams, SOPs, runbooks, RCA/PIR documents, change records, knowledge articles, configuration records, and client-facing updates. * Ability to work independently in a dedicated client role while collaborating effectively with service-desk, NOC, engineering, service-management, and client teams. * Ability to participate in after-hours maintenance, major-incident response, or escalation coverage as required by the 24 x 7 service model. * Must be eligible to work as a US-based iT1 employee and perform services remotely or locally as required. REQUIRED CERTIFICATIONS * Cisco CCNP or higher * Palo Alto Networks Certified Network Security Administrator (PCNSA) or comparable firewall certification. * Cisco Certified Specialist credentials in enterprise core, advanced routing, SD-WAN, wireless, security, or data center technologies. * Microsoft certification related to Teams voice, collaboration, or communications systems. ## Description The Senior Network Engineer provides senior-level operational ownership and Tier 3 engineering support for network, connectivity, wireless, security, optical, voice, and unified communications infrastructure. The role focuses on service restoration, complex troubleshooting, approved changes, platform health, escalation coordination, documentation, continuous improvement, and reliable delivery within the managed-services scope. The engineer works closely with iT1 service management, the dedicated Client Success Manager, client stakeholders, carriers, and technology vendors. Requirements * Act as a Tier 3 subject-matter escalation point for complex incidents and service degradations. * Perform alert validation, incident triage, service-restoration actions, incident remediation, problem management, root-cause analysis, post-incident reviews, known-error tracking, and corrective-action follow-up. * Plan and implement approved standard, normal, and emergency changes with impact assessment, maintenance-window coordination, rollback planning, validation, closure documentation, and follow-up actions. * Coordinate OS, firmware, and infrastructure patching activities within the approved scope, including planning, testing, rollout, validation, and vendor coordination. * Provide remote break-fix and engineering support for routers, LAN and data center switches, firewalls, load balancers, network access control, Cisco ACI/APIC, WAN edge devices, VPN infrastructure, routing protocols, switching protocols, VLANs, segmentation, QoS, and high-availability pairs or clusters. * Monitor, investigate, and improve infrastructure availability and performance using health, capacity, telemetry, configuration, threshold, log, interface, latency, jitter, packet-loss, redundancy, and failover indicators where supported. * Troubleshoot and manage Cisco SD-WAN controllers, edge devices, overlays, tunnels, internet circuits, Starlink connectivity, and site-to-site or remote-access VPN services. * Support wireless controllers and access-point infrastructure, including availability, registration, RF utilization indicators, authentication failures, roaming, interference, firmware status, configuration backup, security alerts, capacity, and coverage trends. * Monitor and manage in-scope optical network nodes supporting dark-fiber connectivity, including interfaces, optical levels, span health, hardware alarms, environmental status, protection paths, protection switching, redundancy, utilization, and vendor escalation. * Support voice and unified communications platforms including AudioCodes Routing Manager, One Voice Operations Center, Session Border Controllers, MediaPack gateways, SIP trunks, Cisco Webex Contact Center, and Microsoft Teams voice/Direct Routing integration. * Maintain accurate HLD/LLD documentation, logical and physical diagrams, configuration records and backups, SOPs, runbooks, troubleshooting procedures, IPAM/DNS/DHCP records, inventories, monitoring definitions, change logs, and knowledge-base articles. * Experience with operational platforms that may include LogicMonitor, Cisco Catalyst Center, Cisco ThousandEyes, NetBrain, SolarWinds, Cisco SD-WAN Manager, and the Client's ITSM platform. * Provide technical input for recurring service reviews, including infrastructure health, incident and alert trends, capacity, performance, lifecycle concerns, risks, documentation currency, vendor cases, and continuous-improvement recommendations. * Communicate clearly with the Client during incidents and escalations, maintain complete work notes and resolution records, validate restoration, and support knowledge transfer., Own complex network, security, identity, endpoint, SaaS, and infrastructure escalations. Design and troubleshoot enterprise networks, lead security and major incident response, review technical changes, support deployments, improve monitoring and documentation, create standards and playbooks, mentor Tier 1 and Tier 2 engineers, and provide technical leadership to clients and internal stakeholders. The role includes on-call participation, client-site support, and approximately 10-20% travel. Top Skills: Apple Business ManagerArubaCiscoDepFirewallsGoogle WorkspaceHalopsaHuduIso 27001JumpcloudJuniperLanMdmMerakiMicrosoft 365Nat/PatNistPagerdutyPalo Alto NetworksPowershellPrtgPythonRoutingRuckusSAMLScimSentineloneSIEMSlackSsoSwitchingUnimusVlanVpnWanWlan Liquidity Services, Designs, deploys, and supports enterprise network solutions for healthcare and business clients. Leads network architecture, infrastructure modernization, and data center initiatives; advises clients, supports consulting and pre-sales engagements, mentors engineers, and coordinates with vendors and internal teams. Participates in an after-hours on-call rotation for critical network escalations. Top Skills: Cloud NetworkingData Center NetworkingFirewallsLanRoutingSwitchingVpnWanWireless Networking What you need to know about the Colorado Tech Scene With a business-friendly climate and research universities like CU Boulder and Colorado State, Colorado has made a name for itself as a startup ecosystem. The state boasts a skilled workforce and high quality of life thanks to its affordable housing, vibrant cultural scene and unparalleled opportunities for outdoor recreation. Colorado is also home to the National Renewable Energy Laboratory, helping cement its status as a hub for renewable energy innovation. Key Facts About Colorado Tech * Number of Tech Workers: 260,000; 8.5% of overall workforce (2024 CompTIA survey) * Major Tech Employers: Lockheed Martin, Century Link, Comcast, BAE Systems, Level 3 * Key Industries: Software, artificial intelligence, aerospace, e-commerce, fintech, healthtech * Funding Landscape: $4.9 billion in VC funding in 2024 (Pitchbook) * Notable Investors: Access Venture Partners, Ridgeline Ventures, Techstars, Blackhorn Ventures * Research Centers and Universities: Colorado School of Mines, University of Colorado Boulder, University of Denver, Colorado State University, Mesa Laboratory, Space Science Institute, National Center for Atmospheric Research, National Renewable Energy Laboratory, Gottlieb Institute