Senior Network Infrastructure Engineer

Senior Network Infrastructure EngineerMetroSys 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 ResponsibilitiesSupport 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 QualificationsMust currently reside in the Greater Phoenix, AZ metropolitan area.5+ years of enterprise network engineering experience.Strong hands-on experience with:Cisco routing and switchingPalo Alto Networks firewallsVMware NSXEnterprise WAN and SD-WANStrong 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 QualificationsExperience 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.