Top Senior Network Engineer Jobs in Denver & Boulder, CO

Designs, implements, and manages enterprise SD-WAN, SASE, network security, cloud networking, and UCaaS solutions for managed-services clients. Leads network transformation projects, serves as a technical escalation point, mentors engineers, develops automation, creates documentation, and supports uptime SLA compliance. The role requires advanced expertise across Cato, Fortinet, Versa, Cisco Meraki, routing, switching, multi-cloud connectivity, Zero Trust architectures, and network programmability.

Design, deploy, validate, and maintain Comcast’s national optical transport backbone. Responsibilities include backbone service engineering, capacity planning, network troubleshooting, circuit validation, software and firmware lifecycle management, vendor coordination, technical documentation, and on-call operational support. The role requires extensive Ciena 6500 and large-scale DWDM experience, strong networking fundamentals, and the ability to lead technical decisions during critical events.

Designs, deploys, configures, monitors, troubleshoots, and supports enterprise network infrastructure and virtual server environments for the US Space Force. Configures routers, switches, firewalls, and telephony systems; analyzes network activity; establishes network standards; optimizes performance; develops security guidance; and advises technical and government stakeholders. The role requires advanced networking expertise, dynamic routing, WAN, SDN, VMware switching, project collaboration, and an active Top Secret clearance with SCI eligibility.

Leads enterprise network deployment and switch refresh projects across data centers and remote offices. Designs and implements routing, switching, SDA, spine-leaf, VXLAN, and LISP solutions; troubleshoots complex network issues; and develops deployment strategies, documentation, and configurations. Mentors engineers, collaborates with project teams and clients, researches networking technologies, and supports infrastructure modernization.

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.

Designs, analyzes, plans, configures, tests, and maintains network systems and components supporting mission-critical communications. Performs capacity planning, network architecture and feasibility studies, traffic analysis, technology evaluations, hardware and software selection, and detailed network schematics. Requires an active Secret clearance, Security+ CE certification, physical equipment handling, and occasional after-hours or weekend work. UEWR experience is preferred.

Designs, deploys, and operates high-performance InfiniBand and RoCE networking fabrics for GPU clusters, customer connectivity, and multi-site WAN infrastructure. Manages routing, switching, BGP peering, VLAN/VRF/VPC architectures, automation, monitoring, troubleshooting, documentation, capacity planning, and security audits. Requires deep data center or service provider networking expertise, advanced routing knowledge, and hands-on experience with Arista, NVIDIA, or Cisco platforms.

Designs, implements, configures, maintains, and troubleshoots enterprise network infrastructure across multiple sites. Manages Cisco routing, switching, wireless, VoIP, Palo Alto firewalls, VPNs, security appliances, DNS, DHCP, and related systems. Leads complex network implementations, supports hardware and software upgrades, maintains security standards, documents technical work, collaborates with IT teams and service providers, and contributes to long-term network planning and project delivery.

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, develops, and maintains secure network and communications security systems. Responsibilities include defining requirements, interfaces, and performance parameters; collaborating with electrical hardware and systems engineering teams; conducting trade studies and design reviews; troubleshooting complex network issues; ensuring compliance with security standards; and producing technical specifications, interface documents, and test plans.

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.

Designs, deploys, maintains, and troubleshoots enterprise F5 and Citrix NetScaler load-balancing and DNS infrastructure. Leads highly available infrastructure design, platform upgrades, capacity planning, performance optimization, automation, and complex issue resolution. Provides technical guidance to application, infrastructure, security, and vendor teams in a regulated financial environment, while developing standards, documentation, and implementation procedures.

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, 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 manages secure multi-cloud and hybrid network architectures across AWS GovCloud, Azure Government, on-premises, and classified environments. Responsibilities include configuring cloud connectivity, routing, segmentation, firewalls, VPNs, and security controls; automating infrastructure with Terraform and other IaC tools; troubleshooting complex network issues; and supporting DoD compliance, Zero Trust architectures, documentation, and mission partner connectivity.

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.

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.

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.

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.

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.