Network Administrator

Network  Administrator

HIGHLIGHTS

Location:Â Phoenix, AZ (Hybrid)Â

Position Type:Â Direct Hire

Hourly / Salary:Â BOE

Residency Status:Â US Citizen or Green Card Holder ONLY

Overview

Our client is seeking a skilled Network Administrator to manage the full lifecycle of enterprise campus, data center, and cloud networking environments . This role supports distributed partner networks and ensures high availability, performance optimization, and secure connectivity across LAN, WAN, and WLAN infrastructure .

The ideal candidate brings hands-on expertise in network design, routing and switching, MPLS and SD-WAN environments, firewall administration, and advanced troubleshooting , with the ability to operate effectively in complex, multi-site enterprise environments.

Key Responsibilities

Network Architecture & Lifecycle Management

• Design, implement, and support enterprise LAN, WAN, and WLAN networks , including MPLS-based campus networking environments .

• Integrate data center networking and cloud networking solutions , including hybrid and distributed architectures.

• Lead infrastructure upgrades, redesign initiatives, and network lifecycle management planning to ensure scalability and performance.

Routing, Switching & Advanced Protocols

• Configure and support complex Layer 2 and Layer 3 routing and switching environments .

• Manage and troubleshoot routing protocols including EIGRP, OSPF, BGP, and MPLS , along with core services such as TCP/IP, DNS, and SMTP .

• Support modern data center technologies including VXLAN and ACI architectures .

• Perform packet capture analysis, root cause analysis, and advanced network diagnostics to resolve performance issues.

Network Security & High Availability

• Administer and maintain firewall platforms including Cisco ASA/Firepower, Palo Alto, and SonicWall.

• Configure and support VPN solutions and secure remote access technologies .

• Manage load balancing and failover configurations using F5 and Citrix platforms to ensure high availability.

• Maintain 24/7 operational integrity through proactive monitoring, incident response, and performance tuning.

Infrastructure Platforms & Tools

• Support enterprise hardware platforms including Cisco Catalyst and Nexus, Arista, Aruba, and Extreme Wireless .

• Utilize Cisco Catalyst Center, SD-WAN platforms, AWS networking tools, and network monitoring systems for configuration, automation, and performance visibility.

Operations, Collaboration & Mentorship

• network monitoring and alerting tools Monitor enterprise network environments using proactive .

• Participate in an on-call rotation and provide after-hours support as needed to maintain service continuity.

• Collaborate with vendors, internal IT teams, and business stakeholders on solution design and implementation.

• Mentor junior network administrators and contribute to technical documentation, knowledge sharing, and operational best practices .

Qualifications

• 3+ years of professional experience in network administration or network engineering within enterprise environments.

• Bachelor’s degree in Computer Science, Information Systems, or related technical field , or equivalent hands-on experience.

• Strong expertise in routing and switching within campus and data center networks .

• Demonstrated experience with network security, VPN technologies, and high-availability configurations .

• Proven troubleshooting skills with the ability to perform root cause analysis in complex, distributed infrastructures .

Preferred Certifications

• Cisco CCNA or CCNP

• ITIL Foundation

• AWS Certified Cloud Practitioner

Work Environment

• Hybrid role with the majority of time spent on-site.

• Participation in an on-call rotation is required.

• Frequent inter-campus travel; occasional regional travel may be required.

" We are GTN – The Go To Network "