Senior Enterprise Network Engineer

Location: Phoenix, AZ
Contract to Hire

We are hiring a senior, well-rounded Enterprise Network Engineer with strong hands-on experience supporting both campus and data center environments. The ideal candidate will design, implement, and troubleshoot multi-building enterprise networks and work across networking, security, and systems teams while mentoring junior engineers.

Core Responsibilities
• Design, support, and troubleshoot enterprise networks across campus and data center
• Handle complex end-to-end network issues and own problems through resolution
• Support wired, wireless, firewall, DNS/DHCP, and load balancing infrastructure
• Participate in on-call rotation, production changes, peer reviews, and RCA
• Maintain network documentation, diagrams, and operational runbooks
• Collaborate with security, systems, DBA, telecom, and application teams
• Support building remodels, new construction, technology refreshes, and vendor integrations

Required Technical Skills
• Cisco Catalyst & Nexus switching (strong hands-on)
• OSPF & BGP troubleshooting (not just configuration)
• VLANs, STP, SVI, trunks, port-channels, DHCP relay, HSRP/VRRP failover
• Multi-building campus network support (MDF/IDF environments)
• MPLS segmentation, VRF, L3VPN concepts and troubleshooting
• Controller-based Wireless – Cisco/Aruba/Extreme (WLC/AP, RF basics, SSID/VLAN mapping, AP onboarding, client connectivity)
• Firewalls – Cisco ASA/Firepower or Palo Alto (NAT, ACLs, VPNs, packet flow analysis)
• Enterprise DNS/DHCP/IPAM – BlueCat preferred, Infoblox acceptable
• Load balancers – F5 or Citrix NetScaler (VIPs, pools, health checks, SSL termination)
• Packet capture analysis and cross-layer troubleshooting
• AWS or Azure networking fundamentals (VPC, VPN, subnets, peering, on-prem integration)