Senior IT Network Engineer

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 corporate firewall platforms and policies in partnership with Security, including implementation, rule changes, lifecycle management, and troubleshooting. Design and maintain 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. Maintain accurate network diagrams, configurations, IP addressing, circuit information, operating procedures, and recovery documentation. Develop and maintain scripts, infrastructure-as-code, and automation used to deploy, configure, monitor , or manage corporate network services. Implement and&n