Lead Network Engineer

LSEG (London Stock Exchange Group); Creve Coeur (MO); On-site; USD 90,000 - 140,000; Full time

Job summary

LSEG (London Stock Exchange Group) seeks a Senior Associate for 2nd line network support across its platforms, networks, applications, services and websites. The role emphasizes reliability, automation, and support to Operations and Project Delivery with a focus on scalable, secure and performant digital platforms.

You will translate business needs into network requirements, maintain documentation, and collaborate with global teams to ensure operational stability and continuous delivery.

Qualifications

• Rich experience identifying and solving network issues end-to-end.
• Significant experience with routing and switching and routing protocols (CCNA/CCNP preferred).
• Experience in network operations, project delivery and engineering.
• Experience with enterprise network management including vendor gear (Cisco/Juniper/Arista).
• Scripting and automation familiarity (Python, Ansible, Terraform, GitLab, Rundeck).

Responsibilities

• Supports the technology lifecycle through design, build and maintenance of systems.
• Administers network services, ensuring applications perform against baselines.
• Monitors availability and identifies improvement opportunities.
• Engages with telcos, third parties and partners as required.
• Makes technical design decisions and manages workloads independently.
• Documents designs and adheres to industry standards.
• Defines lifecycle strategies for hardware and software including capacity.
• Supports deployment of emerging engineering patterns across teams.
• Translates business requirements into technical network requirements.
• Collaborates with multiple projects and provides updates to partners.
• Builds and validates technical requirements focusing on performance and operability.
• Contributes to infrastructure and network design work.
• Supports day-to-day network operational issues.

Skills

Network troubleshooting

Routing & switching

CCNA/CCNP preferred

Network automation

Cloud networking

Tools

Cisco

Juniper

Arista

Fortinet

F5

Job description

Position Summary

The role includes ongoing support and reliability of the LSEG ecosystem (Platforms, Networks, Applications, Services, and Websites). The focus of this role is to provide 2nd line support to the Operations and Project Delivery (Implementation) functions, ensuring operational stability and ongoing adaptability of the LSEG global network. Key responsibilities are creating and maintaining software automation that provides the reliability and availability of digital platforms and their software delivery pipelines.

Responsibilities

• Supports the technology lifecycle through the design, build and maintenance of systems
• Administer LSEG network services, ensuring applications and services perform against baseline levels
• Monitors network services, focusing on availability, while identifying improvement opportunities
• Handles service providers (telcos), third parties and partners as required
• Makes technical design and amendment decisions and independently handles workloads
• Crafts, reviews and maintains documentation, complaint with LSEG (industry) standards
• Defines lifecycle management strategies for hardware and software, including capacity considerations
• Supports the deployment of emerging engineering patterns across development teams
• Translates business requirements into technical (network) requirements, through analysis of data
• Collaborates with multiple projects in parallel providing regular updates to multiple partners
• Builds and validates technical requirements, with emphasis on performance, resilience and operability
• Gets involved into design work in the infrastructure and network domain, providing innovative solutions
• Supports day-to-day network operational issues and manage enterprise network

Qualifications & Experience

• Rich experience in identifying and solving network issues, end-to-end
• Significant experience of routing and switching and routing protocols (CCNA/CCNP preferred)
• Significant experience in network operations, project delivery and engineering
• Excellent experience in managing enterprise networks
• Good in handling DDI/infloblox (L1 Support)
• Excellent in handling and managing Wireless infra
• Significant experience with network technologies, including Cisco, Juniper, Arista, Fortinet & F5 – at least two of these
• Excellent network skills, including HSRP, NAT, MPLS, VPN, GRE, BGP and OSPF
• Basic multicast skills, including IGMP, RP and PIM
• Basic knowledge of firewall technologies, including next‑generation features & functions
• Basic knowledge of load‑balancing technologies, including application delivery control
• Good knowledge of network packet captures, tooling and ability to analyse
• Good knowledge of datacenter networking including Software‑Defined Networking, Cisco ACI, VxLAN
• Good scripting and automation experience (Python, Ansible, Terraform, GIT, GitLab, Rundeck, etc.)
• Outstanding interpersonal skills, both spoken (verbal) and written English language abilities
• Previous experience working in/with architecture, engineering and network operation teams
• Previous experience working with banking infra and supporting financial institution networks
• Experience in cloud, specifically cloud networking standard methodologies
• Proven exposure to financial sector, including low‑latency (trading) environments
• Experience in managing and handling enterprise network

Career Stage

Senior Associate

Equal Opportunity Employment

We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone’s race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants’ and employees’ religious practices and beliefs, as well as mental health or physical disability needs.