Senior Infrastructure Engineer – Data Centre Networking

NielsenIQ; London; On-site; GBP 70,000 - 90,000; Full time

Job summary

A leading data analytics firm in London seeks a Senior Infrastructure Engineer to design and manage enterprise data centre networks. Candidates should have over 5 years of experience in networking and hold a CCNP certification. This role involves operational management and the use of automation tools. The company offers a flexible work environment and a focus on diversity and inclusion.

Benefits

Flexible working environment

Volunteer time off

LinkedIn Learning

Employee-Assistance-Program (EAP)

Qualifications

• Minimum 5 years as a Network Engineer.
• Minimum 3 years in a senior or SME role.
• Experience with ITIL practices.

Responsibilities

• Design and implement data centre networks.
• Monitor and analyze network performance.
• Manage network upgrades and improvements.

Skills

Cisco network hardware expertise

Cisco data centre technologies

Analytical skills

Automation tools proficiency

Stakeholder management

Documentation skills

Education

Cisco Certified Network Professional (CCNP) – Routing and Switching

Tools

Ansible

Python

SolarWinds

Wireshark

Job description

Overview

As a Senior Infrastructure Engineer within the Global Data Centre Network Team, you will be responsible for designing, implementing, and managing enterprise-level data centre networks. This includes planning, configuring, maintaining, and optimizing network hardware and inter-DC data circuits. You will also co-manage incident and change queues, troubleshoot performance issues, and provide capacity planning and traffic analysis.

Key accountabilities

Design & Planning:

• Research data centre network products, services, protocols, and standards to support the procurement and management of data centre networks.
• Perform network design and capacity planning.
• Develop and maintain network standards aligned with NIQ network security policies.
• Implement policies for network asset management, including documentation, hardware inventories, and network maps.
• Plan and execute improvements, modifications, and/or replacement of network infrastructure.
• Provide expertise in DDI (DHCP, DNS, IPAM).
• Manage tools for validating network performance, SLAs, and reporting.

Operational Management:

• Monitor and analyse performance across DC LANs/fabrics, DC interconnects, and WLAN deployments; identify and resolve bottlenecks.
• Configure, manage, and upgrade network hardware (routers, switches, load balancers) following industry best practices.
• Maintain network toolsets, inventories, and documentation.
• Manage day-to-day DC network operations using Infrastructure as Code (IaC) tools such as Nautobot.
• Recommend and perform network upgrades, improvements, and repairs.
• Collaborate with the network support team on escalations.
• Participate in the on-call rota (approximately one week in ten).
• Mentor and guide junior team members.

Qualifications

Skills and competencies:

• Deep technical expertise in Cisco network hardware, protocols, and standards.
• Hands-on experience with Cisco data centre technologies (VXLAN, ACI).
• Strong analytical and troubleshooting skills for complex network issues.
• Proficiency in automation tools: Ansible, Python, Nautobot, JSON, Cisco DNA Center.
• Experience with monitoring and analysis tools: SolarWinds, NetFlow, Telemetry, Wireshark, ThousandEyes.
• Effective stakeholder management and conflict resolution.
• Strong documentation skills for project handovers and updates.
• Ability to prioritize and perform under pressure.
• Capable of presenting technical concepts to non-technical audiences.

Experience:

• Minimum 5 years as a Network Engineer.
• Minimum 3 years in a senior or SME role in networking.
• Experience working in global, distributed teams.
• Familiarity with ITIL practices (Incident, Change, Problem, CSI).
• Exposure to SAFe (Scaled Agile Framework) is desirable.
• Proven ability to build relationships with internal teams and external partners.
• Experience with DDOS prevention services (e.g., Radware) is a plus.
• Mentoring and leadership experience is desirable.
• Familiarity with Equinix Service Provider and ECX (Cloud Exchange Services) is a plus

Qualifications

Required:

• Cisco Certified Network Professional (CCNP) – Routing and Switching

Desirable:

• Cisco Certified Internetwork Expert (CCIE) – Routing and Switching
• Cisco Certified Network Professional (CCNP) – Data Centre

Benefits

• Flexible working environment
• Volunteer time off
• LinkedIn Learning
• Employee-Assistance-Program (EAP)

About NIQ

NIQ is the world’s leading consumer intelligence company, delivering the most complete understanding of consumer buying behavior and revealing new pathways to growth. In 2023, NIQ combined with GfK, bringing together the two industry leaders with unparalleled global reach. With a holistic retail read and the most comprehensive consumer insights—delivered with advanced analytics through state-of-the-art platforms—NIQ delivers the Full View. NIQ is an Advent International portfolio company with operations in 100+ markets, covering more than 90% of the world’s population.

For more information, visit NIQ.com

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Our commitment to Diversity, Equity, and Inclusion

NIQ is committed to reflecting the diversity of the clients, communities, and markets we measure within our own workforce. We exist to count everyone and are on a mission to systematically embed inclusion and diversity into all aspects of our workforce, measurement, and products. We invite candidates who share that mission to join us. We are proud to be an Equal Opportunity/Affirmative Action-Employer, making decisions without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability status, age, marital status, protected veteran status or any other protected class. Our global non-discrimination policy covers these protected classes in every market in which we do business worldwide. Learn more about how we are driving diversity and inclusion in everything we do by visiting the NIQ News Center: NIQ News Center – Diversity and Inclusion