Azure Cloud Security Engineer - Tesco Mobile

Tesco UK; Slough; Hybrid; GBP 60,000 - 80,000; Full time

Job summary

A leading mobile network provider in the UK is seeking a Cloud Security Expert to enhance security for Azure infrastructures. This role involves defining security standards, collaborating with development teams, and contributing to CI/CD pipeline security. Ideal candidates will have strong experience in cloud security operations, especially with Azure, and a collaborative attitude. The position offers a blended working pattern and promotes an inclusive culture.

Qualifications

• Proven experience in cloud security operations (Azure).
• Strong understanding of Azure Security Hub and posture management tools.
• Experience with CI/CD pipeline security integration.

Responsibilities

• Define and evolve Azure infrastructure security standards.
• Collaborate with teams to enhance logging and observability.
• Lead efforts to secure cloud infrastructure.

Skills

Cloud security operations (Azure)

Azure Security Hub

Automation using PowerShell or Azure CLI

Infrastructure as Code (Terraform)

SIEM tools

CI/CD pipeline security integration

SAST and secure coding practices

Collaborative attitude

Tools

Azure CLI

Terraform

Splunk

Docker

Kubernetes

Job description

Shape the Future of Cloud Security at Tesco Mobile

Tesco Mobile is the UK’s largest virtual mobile network, powered by O2 and backed by the strength of Tesco. We’re known for doing things differently — winning awards for customer satisfaction and bringing the best of Tesco to over five million customers!

Join a tight-knit, inclusive team where your expertise in cloud security will make a real impact. You’ll be empowered to innovate, supported by the scale and resources of two major brands.

Our Engineering team is agile, collaborative, and deeply invested in delivering secure, scalable solutions. You’ll be part of the Run & Operate Chapter, working within the DevSecOps Squad — a group responsible for the infrastructure and tooling that powers Tesco Mobile’s engineering systems.

While your focus will be Azure cloud security, you’ll also collaborate with DevOps engineers, automation specialists, and platform experts to ensure our environments are secure, resilient, and future-ready.

We will be looking for you to lead efforts to secure our cloud infrastructure, improve visibility through logging and SIEM, and embed security into our development lifecycle.

• Define and evolve Azure infrastructure security standards
• Act as an authority in cloud security
• Collaborate with development teams to enhance logging and observability
• Validate infrastructure changes against security guidelines
• Work with the Cyber Security Team to align on strategy and compliance
• Advocate for security improvements with clear, business-focused communication
• Support DevOps initiatives including CI/CD pipeline security and automation

Essential skills & experience:

• Proven experience in cloud security operations (Azure)
• Strong understanding of Azure Security Hub and posture management tools
• Automation skills using PowerShell or Azure CLI
• Infrastructure as Code experience (Terraform)
• Experience with SIEM tools and log management
• CI/CD pipeline security integration
• SAST and secure coding practices
• A collaborative attitude and eagerness to learn

Bonus skills:

• Exposure to AWS environments
• GitHub & GitHub Actions
• Splunk (data streams, dashboards, ingestion)
• Python, AWS CLI, and other automation tools
• Docker and Kubernetes

#LI-AF2

#LI-Hybrid

A 50-50 joint venture between Tesco and VMO2 that was established back in 2003, Tesco Mobile has gone from strength to strength as we’ve launched into new services and markets. With more than 5 million customers, we’re the largest mobile virtual network operator in the UK. We’re proud to have an inclusive culture that’s uniquely Tesco Mobile, with a strong sense of community, plus all the benefits of working for one of the shareholders.

We care for human connection and we keep our customers at the heart of everything we do, which is why we’ve embraced the Agile way of working. Agile is more than just a methodology – it’s a liberating journey that puts customers and purpose first. It empowers us to self-organise, collaborate, co-create and rapidly inspect and adapt everything we do – allowing us to respond at pace to our customers’ needs. It encourages variety of thought and enables us to thrive, both individually and collectively.

We are proud to have an inclusive culture at Tesco where everyone truly feels able to be themselves. At Tesco, we not only celebrate diversity, but recognise the value and opportunity it brings. We’re committed to creating a workplace where differences are valued, and make sure that all colleagues are given the same opportunities.We’re proud to have been accredited Disability Confident Leader and we’re committed to providing a fully inclusive and accessible recruitment process. For further information on the accessibility support we can offer, please click here.

We’re a big business and we can offer a range of diverse full-time & part-time working patterns across our many business areas, which means that we can find something that works for you. We work in a more blended pattern -combining office and remote working. Our offices will continue to be where we connect, collaborate and innovate. If you are applying internally, please speak to the Hiring Manager about how this can work for you - Everyone is welcome at Tesco.