Senior Network Engineer

About the Role: Grade Level (for internal use): 10Network Engineer Global Network Services is seeking a Network Engineer with a strong interest in network automation to help build and operate S&P Global's multi-cloud network platform. This role is central to our drive to replace manual network provisioning with repeatable, code-driven delivery across AWS, Azure and GCP. You will write and extend automation, implement cloud network changes, and support the platform in production - working alongside senior engineers who will guide you on design decisions and review your work. This role suits an engineer who enjoys both writing code and understanding the network it configures, and who wants to grow their cloud networking depth in a large and varied environment. Job Responsibilities Network Automation and Infrastructure-as-Code Write, test and maintain Terraform modules to provision cloud network services across AWS, Azure and GCP, working to patterns set by the senior engineering team. Build scripts and tooling in Python and Ansible to remove repetitive manual network tasks and improve consistency. Extend existing automation to cover new network services and use cases, and help keep shared modules current as cloud platforms evolve. Contribute to CI/CD pipelines for network change, including automated validation and pre-deployment testing. Help develop automated configuration and compliance checks so deviations from approved standards are detected early. Follow good engineering practice in shared repositories - version control, peer review, readable modular code and clear documentation. Identify manual tasks in your own work that could be automated, and propose them to the team. Cloud and Hybrid Networking Implement and support cloud network solutions across AWS, Azure and GCP based on agreed designs and requirements. Configure and maintain core cloud networking components including VPCs and VNets, subnets, Transit Gateway attachments, VPC peering, route tables, security groups, load balancers and DNS. Support hybrid connectivity across AWS Direct Connect, Azure ExpressRoute and site-to-site VPN. Respond to network requests and troubleshoot network failures to diagnose, isolate and resolve issues, escalating to senior engineers where appropriate. Apply routing fundamentals including BGP and OSPF when supporting connectivity between cloud and on-premises environments. Prepare and execute approved network changes within agreed maintenance windows, including documented back-out steps. Collaboration and Continuous Improvement Work with application, security and infrastructure colleagues to deliver network changes that meet enterprise standards and compliance requirements. Produce and maintain low-level documentation, automation runbooks and standard operating procedures. Provide support to operations engineers on network issues, and participate in on-call rotation and out-of-hours change windows as required.