Senior IT Network Engineer

Job Description Job Description We are looking for an experienced Senior IT Network Engineer to own and support Spire's corporate and back-office network environment. Reporting to the Global IT Director, this is a hands-on role with primary responsibility for the design, implementation, operation, reliability, and lifecycle management of the corporate network. You will own the networking that supports Spire's offices, remote users, corporate services, and back-office systems, while working closely with Security, Infrastructure, Facilities, and other technical teams. The role includes responsibility for corporate routing, firewalls, VPN and remote access, office-to-office connectivity, DNS, wireless networking, network authentication, and related network infrastructure. You will also help modernize legacy and bespoke network services, improve resiliency, and reduce operational dependency on individual subject-matter experts. We are looking for someone who is proactive, self-directed, and comfortable owning complex technical problems from architecture through implementation and ongoing operation. The right person will combine strong network-engineering fundamentals with disciplined operational practices, including documentation, change management, monitoring, lifecycle management, and follow-through. Role & Responsibilities Own the architecture, implementation, operation, and reliability of Spire's corporate and back-office network environment. Design, configure,maintain, and troubleshoot corporate routing, switching, wired and wireless networking, firewalls, VPNs, and office-to-office connectivity. Own the corporate remote-access environment, including VPN architecture, operation, authentication integration, user connectivity, and troubleshooting. Manage corporatefirewall platforms and policies in partnership with Security, including implementation, rule changes, lifecycle management, and troubleshooting. Design andmaintain network segmentation and routing between corporate offices, corporate cloud services, remote-access environments, and approved external connections. Own corporate DNS operations and related network services supporting identity, email, SaaS, endpoints, and other business systems. Manage office-to-office and corporate site-to-site VPN connectivity, including IPsec tunnels and related routing. Support corporate cloud networking for IT-owned systems and services, including routing, connectivity, security controls, and integration with office and remote-access networks. Maintain and improve corporate wireless networking and network-authentication services. Serve as the senior technical escalation point for complex corporate network outages and connectivity issues. Troubleshoot difficult problems involving routing, VPNs, firewalls, DNS, authentication, certificates, wireless networking, cloud connectivity, and interdependent network services. Partner closely with Security on network-security architecture,firewall policy, segmentation, secure-access requirements, PKI, and other security controls. Partner with Infrastructure and Engineering teams on connectivity between corporate and engineering environments, ensuring secure, reliable, and well-defined network boundaries. Maintainaccurate network diagrams, configurations, IP addressing, circuit information, operating procedures, and recovery documentation. Develop andmaintain scripts, infrastructure-as-code, and automation used to deploy, configure, monitor, or manage corporate network services. Implement andmaintain monitoring and alerting to identify network availability, reliability, capacity, and performance issues. Plan and execute network hardware, software, certificate, circuit, and service lifecycle activities. Support office openings, moves, expansions, consolidations, closures, and network infrastructure changes in partnership with End User Technology, Facilities, carriers, and vendors. Manage or coordinate ISP, carrier, circuit, and network-vendor relationships whererequired. Follow disciplined change-management practices, including planning, peer review, testing, documentation, rollback planning, and post-change validation. Proactivelyidentify architectural, reliability, lifecycle, capacity, and operational risks and drive them through resolution. Participate in after-hours escalation or on-call support for critical corporate network incidents whenrequired. Contribute to broader IT initiatives involving infrastructure modernization, reliability, automation, cloud services, workplace technology, and security. Basic Qualifications 5+ years of experience in network engineering, network operations, infrastructure engineering, or a similar hands-on technical role. Strong knowledge of TCP/IP, routing, switching, DNS, DHCP, NAT, VPNs, firewalls, VLANs, and network segmentation. Hands-on experience designing,operating, and troubleshooting enterprise routing and switching environments. Experience administering enterprisefirewall platforms and implementing firewall policy and rule changes. Experience designing,operating, and troubleshooting remote-access and site-to-site VPN technologies, including IPsec and SSL-based VPNs. Strong troubleshooting skills and the ability to diagnose complex connectivity and network-service issues across multiple layers and systems. Experience supporting multi-site corporate networks, including office connectivity, WAN services, wireless networking, and Internet circuits. Experience with cloud networking in AWS, Azure, or similar environments. Working knowledge of identity, authentication, MFA, certificates, and PKI as they relate to network access and infrastructure services. Experience with network monitoring, logging, alerting, and operational troubleshooting tools. Experience with scripting, infrastructure-as-code, or automation using Terraform, Python, PowerShell, shell scripting, APIs, or similar tools. Demonstrated ability to take ownership of technical systems and projects through completion with limited supervision. Strong documentation, change-management, and operational practices. Ability to communicate clearly and collaborate effectively across IT, Security, Infrastructure, Facilities, Engineering, vendors, and carriers. Ability toparticipate in after-hours escalation or on-call support for critical network incidents. Preferred Qualifications Experience with Palo Alto Networks firewalls or similar enterprise firewall platforms. Experience with BGP and other dynamic routing protocols. Experience with OpenVPN or other enterprise remote-access platforms. Experience with AWS networking, including VPCs, Transit Gateway, Route 53, security groups, routing, and related services. Experience with enterprise wireless platforms and 802.1X or certificate-based network authentication. Experience with DNS administration, domain-management platforms, and related infrastructure services. Experience managing PKI, certificates, or certificate-based authentication for network services.