Cyber Security Engineer ( Mobile

Overview

Tesco Mobile
• Slough or Welwyn Garden City or Manchester
• Permanent
• Working hours 36
• Apply by 25-Jul-2026

At Tesco Mobile, we're committed to keeping our customers safe, secure, and connected. As we continue to evolve our technology and digital platforms, cyber security is at the heart of everything we do.

We're looking for a Cyber Security Engineer to join our team and play a key role in protecting our systems, data, and customers - while helping drive our cyber maturity forward.

As a Cyber Security Engineer, you'll design, implement, and enhance security controls across our technology landscape. From cloud environments (AWS & Azure) to software development and core infrastructure, you'll help ensure security is built in by design.

You'll work closely with cross-functional teams in an Agile environment, influencing how products are built and delivered securely-balancing strong protection with the need for speed and innovation.

This is a hands-on engineering role
, ideal for someone who enjoys solving complex problems, writing code, and collaborating with others to embed security into everything we do.

This role can be based from our Slough, Welwyn Garden City or Manchester office (2 days a week in the office)

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. 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 (12 months service required at the qualifying date) 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

The above information is a shortened summary, refer to our policies for full details

You will be responsible for

• Implement and improve enterprise-scale security controls across network, endpoint, cloud, software, and data
• Embed security into the software development lifecycle (Dev Sec Ops )
• Translate technical security requirements into scalable, practical solutions
• Collaborate with engineering teams to ensure products are secure by design
• Support the delivery and operation of security controls, not just their implementation
• Contribute to improving Tesco Mobile's overall cyber security maturity
• Promote best practices and awareness across the business

You will need

• Strong background in Cyber Security Engineering in a modern environment
• Experience with cloud platforms (AWS and/or Azure)
• Knowledge of Git Hub and security tooling (e.g., Git Hub Advanced Security)
• Proven experience implementing enterprise-level security controls
• Experience integrating security into the software development lifecycle
• Ability to code or script in languages such as Python, Power Shell or Terraform
• Excellent communication skills and ability to influence stakeholders

• Experience with IAM solutions at scale
• Understanding of application security tooling
• Knowledge of frameworks such as NIST or MITRE ATT&CK
• Awareness of current cyber threats and attack techniques
• Relevant certifications or continuous learning in cyber security

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…