Principal Network Engineer

LSEG; St. Louis (MO); On-site; USD 120,000 - 180,000; Full time

Job summary

London Stock Exchange Group (LSEG) is seeking a highly skilled principal WAN Network Engineer to ensure reliability and performance across the global network. You will drive design, automation, and operational excellence in collaboration with cross-functional teams.

The role emphasizes multicast and WAN technologies, data-center networking, and service management principles, with opportunities to influence infrastructure at scale.

Qualifications

• Bachelor's degree in a technology-related field is required.
• CCIE certification is highly desirable and actively pursued.
• Significant experience in WAN networking and data-center networking.

Responsibilities

• Design, build, and maintain corporate networks, services, and platforms.
• Lead technical design decisions and coordinate upgrades with internal and external teams.
• Develop dashboards for near real-time network status and provide expert troubleshooting.

Skills

WAN technologies

Multicast protocols

Network automation

DevOps / SRE

Agile / Scrum

TCP/IP analysis

English communication

Education

Bachelor's degree in technology-related field

CCIE certification (desirable)

Tools

Cisco ASR

Cisco Nexus 9K

SDN / Cisco ACI

Job description

ABOUT US:

LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a commitment to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, handle risk and create jobs. It’s how we’ve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services – and our open-access model – we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity. LSEG is headquartered in the United Kingdom, with significant operations in 70 countries across EMEA, North America, Latin America and Asia Pacific. We employ 25,000 people globally, more than half located in Asia Pacific. LSEG’s ticker symbol is LSEG.

Our People:

People are at the heart of what we do and drive the success of our business. Our culture of connecting, creating opportunity and delivering excellence shape how we think, how we do things and how we help our people fulfil their potential. We embrace diversity and actively seek to attract individuals with unique backgrounds and perspectives. We break down barriers and encourage teamwork, enabling innovation and rapid development of solutions that make a difference. Our workplace generates an enriching and exciting experience for our people and customers alike. Our vision is to build an inclusive culture in which everyone feels encouraged to fulfil their potential. We know that real personal growth cannot be achieved by simply climbing a career ladder – which is why we encourage and enable a wealth of avenues and interesting opportunities for everyone to broaden and deepen their skills and expertise. As a global organization spanning 70 countries and one rooted in a culture of growth, opportunity, diversity and innovation, LSEG is a place where everyone can grow, develop and fulfil your potential with relevant careers.

Role Summary:

As a highly skilled principal network engineer, you will be responsible for the ongoing support and reliability of all components within the LSEG ecosystem, encompassing platforms, networks, applications, and services. In this role, you will provide escalation support for important network services, ensuring the operational stability and performance of the LSEG global network. You will also find opportunities and improvements, then define requirements for software automation to enhance the features, functions and reliability of the network, underpinning LSEG’s digital platforms.

What You will be Doing:

We will play a pivotal role in designing, building, and maintaining systems, software, and applications across various domains, ensuring the highest quality outcomes. We will independently make technical design and amendment decisions, effectively leading the workload. By analysing data and understanding business requirements, we will translate them into technical specifications, ensuring alignment with infrastructure and network capacity needs. We will develop dashboards to provide near real-time network status. Collaborating closely with network operations and service teams, we will provide in-depth technical support and guidance for all multicast- and WAN-related issues and implementations. This role requires a proactive problem solver with a deep understanding of multicast protocols, WAN infrastructure, and a passion for delivering exceptional service. When necessary, we will lead upgrades, coordinating efforts with internal teams and third parties. Building accurate documentation and monitoring system performance are essential to support business activities and continuous improvement. We will support the deployment of engineering patterns and contribute to creating solutions by coordinating design requirements to be automated, tested and released.

What You will Bring:

• Proven experience in network products and services, with specific focus on Cisco WAN technologies, including ASR and Nexus9K.
• Expertise in LAN, WAN, MPLS, VPLS, LDP, GRE, BGP, OSPF, and ISIS within a VRF context for L2/L3VPN services, Traffic Engineering, and RSVP.
• Comprehensive knowledge of multicast concepts, including PIM-SM, PIM-SSM, IGMP, MVPN, and MLDP.
• Proficiency in product-aligned, service-focused work, with a solid grasp of network automation, SRE, and DevOps or equivalent experience.
• Working with Agile methodologies (Scrum, Kanban) and project management tools like JIRA.
• Excellent skills in network packet analysis and packet capture tools for troubleshooting.
• Familiarity with load balancing technologies, TCP/IP, and multicast in internet environments.
• Understanding of low-latency technologies commonly used in the financial sector.
• Experience in Data Centre Networking, including Software-Defined Networking (SDN), Cisco ACI, VxLAN, and related technologies.
• Proficiency in Service Management processes, preferably with ITIL knowledge.
• Excellent spoken and written English skills, enabling meaningful collaboration.

Preferred Skills And Experience

• A bachelor’s degree or equivalent experience in a technology-related field is essential.
• CCIE certification, is highly desirable (including actively pursuing accreditations).
• Significant experience in technology-focused positions is crucial.
• Extensive knowledge of routing and switching protocols.
• Substantial experience (5+ Years) as a WAN Network Engineer.
• Exposure to Network Service Providers or the Financial Services Sector.

Career Stage:

Manager

London Stock Exchange Group (LSEG) Information:

Join us and be part of a team that values innovation, quality, and continuous improvement. If you're ready to take your career to the next level and make a significant impact, we'd love to hear from you. LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth. Our purpose is the foundation on which our culture is built.

Integrity, Partnership

Excellence

Change

underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions.

Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce.

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.

You will be part of a collaborative and creative culture where we encourage new ideas. We are committed to sustainability across our global business and we are proud to partner with our customers to help them meet their sustainability objectives. Our charity, the LSEG Foundation provides charitable grants to community groups that help people access economic opportunities and build a secure future with financial independence. Colleagues can get involved through fundraising and volunteering.

LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.

Please take a moment to read this privacy notice carefully, as it describes what personal information London Stock Exchange Group (LSEG) (we) may hold about you, what it’s used for, how it’s obtained, your rights and how to contact us as a data subject.

If you are submitting as a Recruitment Agency Partner, it is essential and your responsibility to ensure that candidates applying to LSEG are aware of this privacy notice.