Director, Network Architecture

Role Profile

We are seeking an experienced and forward-thinking Network Architect with deep expertise in enterprise Wi-Fi and low-latency data centre network design, particularly within Arista-based environments. The successful candidate will play a key role in designing, engineering, implementing, and optimizing scalable and secure network infrastructure, supporting high-performance applications, critically important workloads, and seamless wireless user experiences.

Key Responsibilities

• Architect and design enterprise-grade Wi-Fi networks, ensuring robust performance, security, and scalability across large enterprise campuses or distributed office environments.

• Lead the design and deployment of low-latency Layer 2/3 LANs within data centres, with a solid focus on Arista EOS, spine-leaf topologies, and latency-sensitive applications.

• Define network architecture standards, configuration templates, and deployment guidelines.

• Collaborate with IT design and engineering, product managers, solution managers, cybersecurity, and business units to ensure network solutions meet business and customer functional, performance, and compliance requirements.

• Evaluate new networking technologies and make recommendations aligned with business strategy and future growth.

• Develop detailed architecture and network diagrams, HLDs and documentation for handover and engineering support.

• Lead troubleshooting and root cause analysis of sophisticated network issues and priority one service incidents.

• Mentor junior engineers and provide technical leadership across projects.

Required Skills & Experience

• Confirmed experience designing and deploying enterprise Wi-Fi networks (e.g. Cisco, Aruba, Ruckus), including sophisticated wireless controller configurations, RF planning, and roaming optimization.

• Strong expertise in Arista Networks technologies, including EOS, CloudVision, VXLAN EVPN, and ultra-low-latency switch configurations.

• Deep understanding of network architecture principles including segmentation, QoS, multicast, high availability, and routing protocols BGP/OSPF/ISIS.

• Experience in data centre network design, especially spine-leaf architctures, east-west traffic optimization, and performance monitoring.

• Solid grasp of network security standard methodologies, including NAC (e.g. ClearPass), WPA3, and RADIUS.

• Familiarity with automation tools and network programmability (e.g. GitLab, Ansible, Python, API integration).

• Ability to lead cross-functional technical projects from architectural concept to deployment.

• Relevant certifications (e.g. CCNP/CCIE, Arista ACE, CWNA/CWDP) helpful.

Soft Skills:

• Good oral and written communication skills to engage with technical and non-technical collaborators.

• Strategic problem solver with the ability to align technical initiatives with business objectives.

Preferred Qualifications

• Bachelor’s or Master’s degree in Computer Science, Engineering, or related field.

• Experience in environments requiring ultra-low latency (e.g. high-frequency trading, real-time analytics).

• Knowledge of SDN, container networking, and integration with cloud platforms (AWS, Azure).

Additional Requirements:

• Ability to handle multiple projects and meet timelines.

• Ability to work under pressure, financial and tight timelines

• Willingness to travel occasionally for business needs.

This role is critical to ensuring the organization’s network infrastructure is resilient, secure, and future-ready, enabling seamless connectivity and efficient business operations.

WHAT YOU’LL GET IN RETURN:

• Learning portal access O’Reilly, Udemy, QA, Cisco certifications, cloud training, etc.

• On premise and cloud hands on learning and experience

• Great automation opportunities.

• Opportunities for career progression.

• Location specific benefits.

LSEG Purpose and Values

Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth. Underpinning our purpose, our values of Integrity, Partnership, Excellence and Change set the standard for everything we do, every day. They guide the way we interact with each other, the partners we work with and our customers. Delivering on our purpose and living up to our values is a responsibility that we all share.

To achieve our ambitions through a strong culture, People Leaders need to role model our Values and build the culture for everyone at LSEG to be at their best.

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.

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