Top Senior Network Engineer Jobs in Denver & Boulder, CO

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.

Installs, configures, maintains, and upgrades global network infrastructure, including routers, switches, firewalls, VPN endpoints, datacenter, backbone, and CDN environments. Troubleshoots outages, traffic issues, hardware and software problems, and network incidents. Coordinates with ISPs and vendors, manages switch infrastructure, handles RMAs and errors, and independently resolves complex network issues with limited supervision.

Designs, implements, optimizes, and sustains complex enterprise networks across on-premises and hybrid AWS environments. Responsibilities include routing and switching, firewalls, VPNs, wireless, network access control, cloud connectivity, incident investigation, upgrades, security remediation, documentation, automation, and root cause analysis. Provides technical leadership, customer collaboration, mentoring, and escalation support across multi-vendor infrastructure.

Manages and supports the City of Boulder’s local- and wide-area network infrastructure across on-premises and Azure cloud environments. Designs highly available network, data center, switching, routing, firewall, VPN, wireless, and fiber infrastructure; performs monitoring, troubleshooting, security remediation, lifecycle management, and disaster recovery planning. Coordinates physical plant construction, vendors, contracts, and projects while providing tier 2–3 technical support, customer communication, documentation, and on-call service. Collaborates with IT, facilities, public agencies, and contractors on network connectivity and infrastructure initiatives.

Leads a team of 4–6 senior network engineers while providing hands-on support for complex customer environments. Oversees daily operations, escalations, incident and major incident management, root cause analysis, preventive measures, performance reviews, on-call scheduling, and workload distribution. Troubleshoots and optimizes Cisco, Nexus, Meraki, Palo Alto, Check Point, F5, and SAN technologies, while supporting monitoring, automation, patching, firmware updates, and hardware lifecycle management.

Own end-to-end network reliability across data centers, AWS, and GCP, including routing, switching, DNS, load balancing, service mesh, VPNs, circuits, and cross-connects. Automate network configuration with Ansible, Terraform, GitOps, CI validation, and IPAM. Engineer failover, observability, security hardening, client connectivity, and Kubernetes ingress while participating in an interrupt-contained on-call rotation.

Owns and optimizes resilient, ultra-low-latency network and physical data-center infrastructure for institutional trading across cloud and on-premises environments. Designs routing, multicast, segmentation, firewall, VPN, telemetry, and automation systems. Leads production changes, incident response, failover testing, maintenance, and on-call support for 24/7 trading platforms. Mentors engineers and partners with SRE, product, and trading-system teams to improve reliability and developer velocity.

Design, build, test, and optimize scalable control-plane and data-plane network services and tools. Develop APIs, improve reliability and performance, support cloud products, establish engineering best practices, collaborate across teams, and mentor engineers. The role focuses on distributed systems, networking, observability, containerization, and production-ready software delivery.

Design, develop, and optimize high-performance network datapath software for cloud infrastructure. Build packet-processing, forwarding, routing, filtering, tunneling, load-balancing, observability, and hardware-accelerated networking solutions. Analyze and improve throughput, latency, CPU efficiency, scalability, and reliability across Linux, kernel, user-space, and hardware systems. Lead technical designs through production, investigate complex networking issues, write architecture documentation, collaborate across engineering teams, and mentor engineers.

Design, implement, and operate networking infrastructure for Azure Dedicated private and hybrid cloud environments. Responsibilities include hybrid connectivity, ExpressRoute, SDN solutions, third-party platform integration, network performance and security optimization, live-site operations, automation, observability, troubleshooting, and enabling migration and disaster recovery scenarios.

Designs, deploys, and optimizes enterprise network security solutions for clients. Leads firewall, SD-WAN, segmentation, secure access, identity, and SASE implementations; resolves critical incidents; performs security assessments; advises technical and executive stakeholders; collaborates across cloud and infrastructure teams; and mentors junior engineers.

Manage and optimize secure network infrastructure supporting a central service node and remote sites. Configure VPNs, routers, switches, firewalls, encryption devices, and network access systems; administer Cisco Call Manager, SolarWinds, and Microsoft NPS; troubleshoot connectivity issues; support capacity planning, documentation, compliance, and high availability. Provide on-call support and collaborate with IT stakeholders to maintain reliable mission-critical communications.

Design and scale reliable spine-leaf data center networks supporting GPU clusters and AI workloads. Build Ethernet fabrics using EVPN/VXLAN and BGP, optimize traffic, support RoCE/RDMA, and manage backbone, WAN, DCI, and edge connectivity. Develop network automation and Infrastructure-as-Code solutions, improve observability and telemetry, troubleshoot distributed performance issues, and collaborate with compute, storage, platform, and operations teams. The role requires hands-on Cumulus NOS expertise and experience with large-scale, high-performance infrastructure.

Designs, implements, and manages enterprise SD-WAN, SASE, secure remote access, cloud networking, and UCaaS solutions. Leads network transformation projects, supports Cato, Fortinet, Versa, and Cisco Meraki platforms, mentors engineers, provides advanced technical escalation, develops automation, documents solutions, and helps maintain client uptime SLAs. The role also performs network assessments, implements Zero Trust architectures, troubleshoots complex environments, and collaborates directly with clients and managed-services teams.

Maintain, upgrade, integrate, and sustain complex radar network infrastructure supporting Space Force missile surveillance and warning missions. Responsibilities include network and systems design, device and telecom configuration, testing, connectivity, backup and recovery, requirements translation, and technical integration. The role supports PARCS and UEWR systems, national security mission networks, distributed and virtual environments, and engineering change requests. It also may involve Agile or SecDevOps project support, risk management, scheduling, and performance reporting.

Build and operate blockchain network infrastructure integrating protocols such as Bitcoin and Ethereum with internal services. Design reliable APIs, SDKs, data contracts, observability, and SLOs; lead multi-quarter chain integrations, architecture modernization, and migrations. Improve latency, reliability, and cost for high-throughput distributed systems while owning production services and on-call responsibilities.

Design, build, and maintain AI-powered B2B SaaS products across frontend, backend, and AI. Own projects end-to-end, collaborate with product and design, ensure maintainability, mentor teammates, and inform roadmap and implementation decisions.

Designs, implements, and maintains multi-vendor DoD networks while ensuring system security and regulatory compliance. Responsibilities include network configuration, vulnerability scanning with HBSS and ACAS, RMF compliance, security violation investigation, policy recommendations, patch and upgrade recommendations, COMSEC material tracking, and customer reporting. The role requires collaboration with end users, strong communication, independent judgment, and an active DoD Secret clearance.

Provides advanced network engineering and firewall expertise in a managed services environment. Owns complex incident resolution, root cause analysis, network project delivery, solution design, implementation, change validation, Palo Alto configuration, network hardening, legacy environment optimization, documentation, and technical mentorship. The role is remote from Brazil and requires fluent English, extensive enterprise networking experience, and deep Palo Alto Networks expertise.

Designs, develops, tests, documents, and maintains moderate to complex business applications. Analyzes requirements, creates system designs, identifies dependencies, estimates development effort, and supports integration across applications, databases, and technology platforms. Provides technical guidance, leads development walkthroughs, ensures adherence to software quality and security standards, and recommends improvements to planning, design, development, and testing processes.

Ensure reliability, scalability, and usability of network infrastructure for Akamai Connected Cloud. Define requirements and SLOs, build automation and CI/CD pipelines, collaborate with dev/QA to improve code and stability, troubleshoot complex network issues (on-call), and mentor teammates while driving architectural standards.

The Senior Network Engineer will design, deploy, and troubleshoot advanced network systems, mentor team members, and improve network performance and security.

Designs, leads, and supports enterprise network security and infrastructure solutions. Responsibilities include network engineering, NAC, IAM, ZTNA, VPN, certificate and PKI management, secure connectivity, identity-driven access controls, segmentation, highly available distributed environments, platform upgrades, lifecycle management, and capacity planning. The role also evaluates technology solutions and leads cross-functional initiatives focused on performance, reliability, scalability, and capacity.

Provide Tier 3 network engineering and operations support across enterprise locations. Responsibilities include network design, implementation, installation, troubleshooting, optimization, documentation, technology testing, incident analysis, and complex problem resolution. Support geographically dispersed sites, network upgrades, routers, switches, cryptographic devices, and DoD STIG implementation. The role requires physical equipment handling, collaboration, independent problem solving, and up to 25% CONUS travel.

Own portfolio-wide data center network architecture, structured cabling, security, OT segmentation, colocation connectivity, commissioning, and production operations. Design standards and construction specifications, review contractor work, manage monitoring, changes, capacity, incidents, and documentation, and serve as the escalation point for live-site network issues. The remote role requires heavy travel to active construction and commissioning sites.