Senior Network Engineer

The Intersect Group; Phoenix, Northern (AZ, KY); Hybrid; USD 58,000 - 96,000; Full time

Job summary

The Intersect Group seeks a Senior Network Engineer for the Greater Phoenix area to support and modernize a large OT network powering municipal infrastructure. This 100% on-site, contract-to-hire role covers field and office work across 1,300+ locations, requiring hands-on engineering and strong communication skills.

You will troubleshoot Layer 2/3, design VLANs, manage routing and switching, mentor junior staff, and collaborate with vendors and leadership to drive network modernization

Qualifications

• 5+ years of hands-on network engineering experience.
• Strong expertise in Layer 2 and Layer 3 networking, routing and switching.
• VLAN design and network segmentation experience.
• Experience with wired and wireless network infrastructures.
• Ability to create and maintain network diagrams and technical documentation.
• Excellent communication skills for non-technical audiences.
• Valid driver’s license and ability to travel locally for field support.

Responsibilities

• Support and maintain a large-scale network infrastructure across 1,300+ locations.
• Troubleshoot complex Layer 2 and Layer 3 networking issues across wired and wireless environments.
• Manage network segmentation, VLANs, routing, switching, and connectivity across distributed locations.
• Participate in ongoing network modernization and future-state architecture initiatives.
• Collaborate with engineering teams, external vendors, and stakeholders on projects.
• Review and contribute to network design documentation, diagrams, and technical standards.
• Mentor junior technical staff and present updates to leadership and executives.
• Perform field-based troubleshooting throughout the metro area.

Skills

Layer 2/3 Networking

Routing & Switching

VLAN Design

Network Segmentation

Wired & Wireless

Documentation

Field Troubleshooting

Tools

Juniper

Cisco

Ruggedcom

Job description

## Senior Network Engineer**Phoenix,AZ85003**Posted: 08/14/2026Employment Type:ContractCategory: IT - Infrastructure - Network/SystemsJob Number: 250904Work Location: On-Site## Job DescriptionSenior Network Engineer (ITS Infrastructure) **Location:** Greater Phoenix Metro Area **Schedule:** 100% Onsite | Monday-Friday | 7:00 AM-4:00 PM **Employment Type:** Contract-to-Hire **Pay Rate:** Up to **$70/hour** depending on experience **Industry:** Public Infrastructure & Intelligent Transportation Systems (ITS) **Please Note:** No Corp-to-Corp (C2C) arrangements. Sponsorship is not available for this opportunity. Make a City-Wide Impact We're partnering with one of the largest municipal transportation organizations in the Southwest to identify a **Senior Network Engineer** who will play a critical role in supporting and modernizing a large-scale operational technology network that powers critical public infrastructure. This is a highly visible opportunity for a hands-on network engineer who enjoys solving complex connectivity challenges, working in the field, and helping shape the future design of a mission-critical network environment spanning more than 1,300 connected locations across a major metropolitan region. The organization is seeking a technical leader first and foremost. While formal people management is not initially required, the right individual will have the opportunity to mentor team members, influence strategy, and potentially grow into a permanent leadership position. ---What You'll Do* Support and maintain a large-scale network infrastructure supporting operational technology systems, surveillance devices, and field communications equipment* Troubleshoot complex Layer 2 and Layer 3 networking issues across wired and wireless environments* Manage network segmentation, VLANs, routing, switching, and connectivity across distributed locations* Participate in ongoing network modernization and future-state architecture initiatives* Work closely with engineering teams, external vendors, and stakeholders on infrastructure improvement projects* Review and contribute to network design documentation, diagrams, and technical standards* Evaluate vendor recommendations and provide technical guidance during future network redesign efforts* Mentor junior technical staff and serve as a trusted technical resource for the team* Present technical updates and recommendations to leadership and executive stakeholders in an easy-to-understand format* Perform both office-based and field-based troubleshooting activities throughout the metro area---Required Qualifications* 5+ years of hands-on network engineering experience* Strong expertise in: + Layer 2 and Layer 3 networking + Routing and switching + VLAN design and implementation + Network segmentation + Troubleshooting complex network environments* Experience supporting both wired and wireless network infrastructures* Ability to create and maintain network diagrams and technical documentation* Strong communication skills with the ability to explain technical concepts to non-technical audiences* Valid driver's license and ability to travel locally throughout the region for field support activities* Must be authorized to work in the United States without current or future sponsorship requirements---Preferred Qualifications* Experience with Juniper networking technologies* Experience with Ruggedcom or other industrial networking equipment* Cisco networking experience* Wireless mesh networking experience* Wi-Fi design, deployment, and troubleshooting experience* Experience evaluating vendor proposals and participating in infrastructure planning initiatives* Familiarity with operational technology (OT), intelligent transportation systems (ITS), surveillance networks, or other critical infrastructure environments---What We're Looking For The ideal candidate is a **true hands-on engineer** who enjoys getting into the details of network operations and architecture. This is not a position for someone who has moved away from technology and into pure management. We're seeking an individual who can: * Troubleshoot complex issues independently* Think strategically about future network architecture* Communicate effectively with technical and non-technical stakeholders* Lead through influence rather than formal authority* Thrive in both office and field environments---Why This Opportunity?* Support one of the largest public infrastructure networks in the region* Direct influence on an upcoming large-scale network modernization initiative* Mix of operational support and strategic architecture work* Opportunity to work with wireless, fiber, and industrial networking technologies* High visibility with leadership and decision-makers* Clear path toward future leadership opportunities for the right individual* Meaningful work that directly impacts the daily lives of thousands of residents and commuters If you're a senior network engineer looking for a role where your technical expertise will have a measurable impact on critical city-scale infrastructure, we'd love to hear from you.