Top Senior Network Engineer Jobs in Denver & Boulder, CO

The Senior Network Engineer will design high-performance network solutions, maintain infrastructure reliability, and enhance security across cloud and on-premise environments.

Lead Greenfield and Brownfield customer network deployments and production migrations. Design and troubleshoot advanced routing (BGP, OSPF, MPLS, VRF), implement firewalls (FortiGate, Cisco ASA), and build secure enterprise VPN and SD-WAN architectures. Participate in U.S.-aligned change windows and resolve complex escalations to minimize downtime.

Lead customer network deployments and brownfield migrations, design and troubleshoot advanced routing and VPN architectures, implement and manage Fortinet and Cisco firewall solutions, perform TAC-level debugging (packet captures, device debug), and own production change windows aligned to US hours.

Senior Network Engineer to troubleshoot escalated network incidents, configure and maintain switches/routers/firewalls/wireless, analyze recurring issues, implement changes and optimizations, monitor performance, mentor Tier 1 staff, and maintain network documentation and topology.

Manage and secure central hub network infrastructure and VPN connectivity, configure and maintain routers, switches, firewalls, and encryption devices, administer Cisco Call Manager, SolarWinds and Microsoft NPS, troubleshoot network issues, perform capacity planning, maintain documentation, ensure compliance with security standards, and provide on-call support for mission-critical operations.

The Senior Network Engineer will lead the Network Operations team in designing scalable network solutions, driving automation, and enhancing network security while ensuring operational excellence.

Manage and maintain network infrastructure, provide architectural solutions, troubleshoot issues in a cloud environment, mentor staff, and ensure network security practices are followed.

The Senior Network Engineer manages global network services, focusing on reliability, compliance, and performance while implementing automated solutions and leading incident responses.

Responsibilities include designing and managing cloud networking solutions, enterprise infrastructure, security controls, automation scripts, and monitoring tools. Requires strong experience in AWS, Azure, and network security.

Design, implement, optimize, and support enterprise network architectures across campus, data center, WAN/SD-WAN, wireless, security, and cloud. Lead complex projects, perform advanced troubleshooting, mentor engineers, create design documentation, and consult with customers and stakeholders to deliver resilient, scalable, and secure networking solutions.

As a Sr. Product Security Engineer, you will focus on network security, identifying gaps, architecting solutions, and leading cross-functional security initiatives.

Serve as the CONUS SME and lead technical authority for LAN/WLAN/WAN operations at military hospitals. Provide enterprise engineering, complex troubleshooting across OSI layers, design and modernization guidance, DoD/DHA compliance, firewall/VPN/IDS/IPS/Zero Trust support, performance optimization, stakeholder interfacing, policy development, and mentor network engineering staff.

The Senior Network Engineer will design, manage, and optimize large-scale data center networks for AI workloads, ensuring reliability and performance.

Build software at Coinbase while responsibly using and integrating generative AI copilots (e.g., LibreChat, Gemini, Glean). Continuously learn evolving tools, apply human-in-the-loop practices, and deliver business-ready outputs that improve efficiency, cost, and quality. Participate in quarterly in-person working sessions as part of a remote-first culture.

Design, deploy, and support secure, high-performance data center and hybrid networks. Troubleshoot LAN/WAN/WLAN, routing (BGP/OSPF), TCP/IP, VPNs, SAN/NAS, and firewalls; monitor networks; automate tasks; mentor junior staff; maintain documentation and security controls; and support DoD contract requirements and clearance processes.

Design, implement, and support enterprise LAN/WAN/SD-WAN, firewall, VPN, wireless, and Azure/VMware networking. Lead SD-WAN transformations, zero trust/security controls, capacity planning, lifecycle management, and Level 4 incident remediation. Collaborate with security, operations, and MSPs, drive standardization, automation, and documentation, and travel to sites for implementations and critical events.

The Sr. Network Engineer designs, implements, and operates cloud and hybrid network infrastructure, emphasizing automation and customer-centric solutions while supporting 24x7 operations.

Design, deploy, and troubleshoot carrier-grade Layer 1-3 connectivity including carrier interconnects, NNIs, MPLS, BGP, VRFs, VLANs, and Azure ExpressRoute. Validate circuit turn-ups, support data center deployments, develop configuration templates and runbooks, and act as escalation for complex transport and routing issues while coordinating with carriers, NOC, and implementation teams.

Design, implement, and maintain secure, high-availability enterprise network infrastructure across co-located data centers and cloud. Lead troubleshooting, performance monitoring, firewall/routing/switching configuration, documentation, vendor collaboration, and mentor junior engineers while supporting deployments and escalated incidents.

The Senior Network Performance Engineer will design simulation motifs, execute performance tests, validate models, and create analysis tools while collaborating with various teams.

Design, implement, and maintain services that store and deploy Fastly's network configuration. Build features for infrastructure provisioning and fleet scaling, improve CI/CD and testing, write performant maintainable code, and mentor other engineers while collaborating with operations and infrastructure teams.

Technical lead to design and build an eBPF-based kernel-level internet simulation and control plane. Own XDP/TC hooks, BPF maps, topology database, and lightweight in-range agents. Mentor engineers, set architecture, and productionize a proof-of-concept for multi-tenant cyber range network simulation with realistic ASN routing and traceroute fidelity.

Design, secure, and maintain multi-enclave enterprise networks for a defense training complex. Lead complex implementations, optimize performance, troubleshoot tier‑III issues, coordinate with stakeholders, and operate routing/switching, encryption (TACLANE), LAN/WAN, DNS/DHCP, firewalls, SDN, and cloud/voice/video systems.

The Senior Network Engineer leads complex networking projects, handles escalated incidents, provides technical guidance, and collaborates on security protocols, ensuring stability and scalability of network infrastructures.

Provide technical pre-sales support for managed network services: design solutions, produce proposals/RFP responses, deliver demos and presentations, obtain vendor certifications, collaborate with sales, product, and operations, and support client engagements through the full sales cycle.