Sr Network Administrator - CONTRACT

NexusTek; Greenwood Village (CO); On-site; USD 120,000 - 160,000; Full time

Job summary

NexusTek in Englewood, CO is seeking a Senior Network Administrator to lead network infrastructure across a stadium, training facility, and corporate environment, supporting live events, business functions, and fan experience at scale.

This is a hands-on, architecture and leadership role focused on high-density WiFi for tens of thousands of concurrent users, multi-ISP BGP routing, hybrid cloud integration, and modern network automation, with a clear path to a permanent, full-time position.

Qualifications

• 7+ years of network engineering in complex enterprise environments.
• Proven large-scale, high-density network experience (25k+ users).
• Hands-on switching, routing, wireless, firewall, and VPN expertise.
• Multi-ISP/BGP design and redundancy experience.
• Hands-on network automation (Python, Ansible, APIs).
• Hybrid cloud connectivity (Azure/AWS) and onsite work readiness.

Responsibilities

• Lead network infrastructure across stadium, training facility, and corporate environments.
• Support live events and fan experience with reliable connectivity.
• Manage high-density WiFi for tens of thousands of concurrent users.
• Implement multi-ISP BGP routing and redundancy, with hybrid cloud integration.

Skills

Network engineering

High-density WiFi

Switching

Routing

Firewall

VPN

BGP

Network automation

Python

Ansible

APIs

Azure

AWS

On-site support

Tools

Ansible

Python

Job description

Rate: Commensurate with experience - details provided on initial call

Location:On-site in Englewood, CO

A major sports team is seeking a Senior Network Administrator to lead network infrastructure across a large stadium, training facility, and corporate environment, supporting live event operations, business functions, and fan experience at scale. This is a genuine architecture and leadership role, not a break-fix administrator seat, covering high-density WiFi for tens of thousands of concurrent users, multi-ISP BGP routing, hybrid cloud integration, and modern network automation. Strong path to a permanent, full-time role with the organization after the season. Fully onsite, no remote or hybrid option.

Required:7+ years in network engineering or administration in complex enterprise environments; proven large-scale, high-density network experience (25k+ concurrent users or similar); strong hands-on switching, routing, wireless, firewall, and VPN expertise; multi-ISP/BGP and redundancy design; hands-on network automation (Python, Ansible, APIs); hybrid cloud connectivity (Azure/AWS); able to work onsite and support live events outside normal hours.