Overview
Tesco Mobile
• Slough
• Permanent
• Apply by 18-Feb-2026
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: award‑winning customer satisfaction, a collaborative culture, and innovative digital experiences for over five million customers.
As a Cloud Security Engineer within the Run & Operate Chapter
, you'll join our Dev Sec Ops Squad
, working alongside Dev Ops engineers, platform specialists, and the Cyber Security Team. Your mission: to secure and optimise our cloud platforms across Azure and AWS
, embedding robust security practices into everything we build and operate.
This is a hands-on role where you'll define cloud security standards, drive improvements, validate infrastructure changes, and strengthen our detection and response capabilities. Your work will directly influence how we protect our services, customers, and engineering systems.
What is in it for you
We re all about the little helps. That s why we make sure our Tesco colleague benefits package takes care of you - both in and out of work. to find out more!
- Annual bonus scheme of up to 20% of base salary
- Holiday starting at 25 days plus a personal day (plus Bank holidays)
- Private medical insurance
- 26 weeks maternity and adoption leave (after 1 years' service) at full pay, followed by 13 weeks of Statutory Maternity Pay or Statutory Adoption Pay, we also offer 6 weeks fully paid paternity leave
- Free 24/7 virtual GP service, Employee Assistance Programme (EAP) for you and your family, free access to a range of experts to support your mental wellbeing
Responsibilities
You will be responsible for
You will play a key role in securing and maturing Tesco Mobile's cloud environments (Azure and AWS):
- Define, maintain, and evolve cloud infrastructure security standards across AWS and Azure
- Act as a subject-matter expert on cloud and infrastructure security
- Lead and deliver cloud security improvement initiatives and posture management work
Operational Cloud Security
- Use services like Azure Security Center/Security Hub and AWS Security Hub to monitor and enhance posture
- Identify threats, risks, and misconfigurations - and implement effective mitigation strategies
- Validate infrastructure changes to ensure they meet security and compliance requirements
Collaboration & Strategy
- Work closely with the Cyber Security Team to align on strategy, controls, and company-wide initiatives
- Communicate risk and security improvements in a clear, business-focused way
- Support containerised environments and cloud-native workloads where relevant
You will need
- Proven experience in cloud security operations with either Azure or AWS (ideally both)
- Hands-on experience with cloud security monitoring and posture management tools
- e.g., Azure Security Center, Azure Defender, AWS Security Hub
- Strong understanding of cloud governance, threat identification, and risk mitigation
- Experience integrating security controls into CI/CD pipelines
- Infrastructure as Code expertise (Terraform preferred)
- Logging/SIEM experience (e.g., Splunk, Sentinel, Cloud Watch Logs)
- Automation skills using Power Shell, Azure CLI, AWS CLI, and/or Python
- Understanding of SAST, secure coding, and Dev Sec Ops practices
- Collaborative mindset and eagerness to learn
Nice to have
- Git Hub & Git Hub Actions
- Experience with both AWS and Azure
- Exposure to Docker, Kubernetes, or cloud container security
- Experience creating dashboards, log ingestion or data streams in Splunk
About us
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…
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