F5/Firewalls Lead Network Engineer

London Stock Exchange Group; London; On-site; GBP 60,000 - 90,000; Full time

Job summary

A leading global financial markets infrastructure organization is seeking a Lead Network Engineer to ensure the reliability of network services. This role encompasses designing and maintaining systems, providing technical support, analyzing data, and collaborating across teams to support operational stability.

Benefits

Healthcare

Retirement planning

Paid volunteering days

Wellbeing initiatives

Qualifications

• Proven experience with low-latency technologies and network products.
• CCIE certification desirable.
• 5+ years of experience as a Senior Network Engineer.

Responsibilities

• Design and maintain network systems across various domains.
• Provide escalation support for critical network services.
• Analyze data to align business requirements with infrastructure needs.

Skills

Network packet analysis

Packet capture tools

Low-latency technologies

Network automation

Load balancing

Multicast protocols

Education

Bachelor's degree in technology-related field

Tools

Cisco ACI

Software-Defined Networking (SDN)

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 dedication 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, manage 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 rewarding 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 organisation 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 meaningful careers.

ROLE SUMMARY:

As a Lead 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, we will provide escalation support for critical network services, ensuring the operational stability and performance of the LSEG global network.

We will find opportunities for improvement and define requirements for software automation to enhance the features, functions, and reliability of the network, supporting LSEG's digital platforms.

WHAT YOU'LL BE DOING:

• Play a key role in designing, building, and maintaining systems, software, and applications across various domains, ensuring high-quality outcomes. Independently make technical design and amendment decisions, effectively handling the workload.
• Analyse data and understand business requirements, translating them into technical specifications to align with infrastructure and network capacity needs. Develop dashboards to provide near real-time network status.
• Collaborate closely with network operations and service teams, providing in-depth technical support and guidance for multicast- and WAN-related issues and implementations.
• Proactively solve problems with a deep understanding of multicast protocols, network infrastructure, and a passion for delivering exceptional service.
• Lead upgrades when necessary, coordinating efforts with internal teams and third parties.
• Build accurate documentation and monitor system performance to support business activities and continuous improvement.
• Support the deployment of engineering patterns and contribute to creating solutions by coordinating design requirements to be automated, tested, and released.

WHAT YOU'LL BRING:

• Proven experience in network products and services, with a focus on low-latency technologies.
• Expertise in LAN, WAN, HSRP, NAT, MPLS, VPN, GRE, BGP, and OSPF.
• 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.
• Experience working on load balancing and firewalls.
• 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 important 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.
• Experience (5+ Years) as a Senior Network Engineer.
• Exposure to Network Service Providers or the Financial Services Sector.

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. Our values of Integrity, Partnership, Excellence and 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. You will be part of a collaborative and creative culture where we encourage new ideas and are committed to sustainability across our global business. You will experience the critical role we have in helping to re-engineer the financial ecosystem to support and drive sustainable economic growth. Together, we are aiming to achieve this growth by accelerating the just transition to net zero, enabling growth of the green economy and creating inclusive economic opportunity.

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

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.

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, and 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.