Senior Network Infrastructure Engineer

Position Overview

MetroSys is seeking a Senior Network Infrastructure Engineer based in the Greater Phoenix area to support a complex enterprise network environment. This position is hands-on and onsite, with responsibility for network operations, security, troubleshooting, infrastructure improvements, and project delivery.

The ideal candidate has strong experience with Cisco networking, Palo Alto firewalls, VMware NSX, SD-WAN, and enterprise data center networking and is comfortable supporting highly available and regulated environments.

Key Responsibilities

• Support and maintain enterprise LAN, WAN, data center, wireless, VPN, and SD-WAN environments.
• Configure and troubleshoot Cisco routers and switches and Palo Alto Networks firewalls.
• Administer firewall policies, NAT, VPN connectivity, network segmentation, and security controls.
• Support VMware NSX and software-defined networking environments.
• Troubleshoot complex routing, switching, connectivity, firewall, and performance issues.
• Support multi-site WAN connectivity, branch offices, third-party connections, and carrier services.
• Participate in infrastructure upgrades, network refreshes, disaster recovery testing, and change activities.
• Monitor network availability, security, and performance and recommend improvements.
• Maintain network diagrams, configurations, operational documentation, and standards.
• Collaborate with local Phoenix-based infrastructure teams as well as cloud, security, systems, and application teams.
• Participate in after-hours maintenance and on-call activities as needed.

Required Qualifications

• Must currently reside in the Greater Phoenix, AZ metropolitan area.
• 5+ years of enterprise network engineering experience.
• Strong hands-on experience with:
  • Cisco routing and switching
  • Palo Alto Networks firewalls
  • VMware NSX
  • Enterprise WAN and SD-WAN
• Strong knowledge of BGP, OSPF, VLANs, VPNs, NAT, and high-availability networking.
• Experience with Palo Alto Panorama.
• Experience supporting enterprise data center environments.
• Strong troubleshooting and communication skills.
• Ability to work onsite in the Phoenix area on a regular basis.

Preferred Qualifications

• Experience supporting financial services or other regulated environments.
• Azure or AWS networking experience.
• Familiarity with Python, PowerShell, Ansible, or network automation.
• Cisco CCNP, Palo Alto, VMware, or similar certifications.