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Tesco • Welwyn Garden City, UK

Security Engineer III - Infrastructure

Employment type:  Full time
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Job Description

The Security Engineer III role focused on Infrastructure Security is responsible for overseeing and shaping security controls across core infrastructure platforms. This role focuses on securing virtual machines, container platforms, infrastructure as code, and desired state configuration technologies across on-premises and cloud environments.

The engineer works closely with infrastructure and cloud teams to ensure security is embedded into infrastructure services by design. They act as a senior technical specialist, driving security improvements, reducing risk through automation, and helping establish secure engineering practices.

• Secure Infrastructure Platforms: Implement and maintain security controls for virtual machine platforms, container environments, operating systems, and cloud infrastructure

• Infrastructure as Code Security: Develop and maintain security standards, policies, and guardrails for infrastructure delivered through Terraform, Bicep, or similar IaC technologies.

• Container & Kubernetes Security: Build and enhance security capabilities across container platforms, including image security, workload protection, runtime controls, admission policies, and Kubernetes hardening.

• Desired State Configuration & Platform Hardening: Define and maintain secure configuration baselines for Windows, Linux, containers, and cloud services using technologies such as Ansible or equivalent platforms.

• Security Automation: Develop automation and engineering solutions that improve prevention, detection, remediation, compliance validation, and operational efficiency.

• Secure Platform Design: Partner with infrastructure and platform engineering teams to provide security guidance, and ensure secure-by-design implementation.

Essential

• Infrastructure Security Expertise: Strong hands-on experience securing enterprise infrastructure platforms, including Windows, Linux, VMware, cloud platforms, and hybrid environments.

• Virtualisation Security: Experience securing virtual machine environments including platform hardening, configuration management, and workload protection.

• Container Security: Deep understanding of container and Kubernetes security principles, including image security, workload isolation, runtime protection, secret management, and cluster hardening.

• Infrastructure as Code: Proven experience developing and securing infrastructure using Terraform, Bicep or equivalent IaC technologies.

Desirable

  • Experience with Kubernetes platforms such as AKS, EKS, OpenShift, or Tanzu.
  • Experience implementing policy-as-code using technologies such as OPA Gatekeeper, Kyverno, Sentinel, or Azure Policy.
  • Familiarity with supply chain security practices, software bill of materials (SBOM), and artifact security.

You might know us as a supermarket, technology company or even for our award-winning mobile network. Truth is, we’re all of those things, and much more. Our colleagues work with one goal in mind, helping to make every day a little better for our customers, colleagues and communities all over the world. No two customers are the same, neither are our colleagues. At Tesco, we champion a balance that lets you thrive both in and out of work. Spend 60% of your week collaborating with colleagues at our office locations or local sites and the rest remotely. Whether you're just kicking off your career, juggling passions, or navigating big life events, we're here to support you. We always welcome a conversation about flexible working, so talk to us throughout your application about how we can support. We're proud to be an accredited Disability Confident Leader, where everyone’s welcome. That’s why we commit to providing a fully inclusive and accessible recruitment process. If you need support with your application, click here for more information. And if you're interested in joining our team but don't tick every box, don't let that hold you back from applying.

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Company benefits

25 days annual leave + bank holidays
Additional voluntary pension contribution
Adoption leave – 26 weeks full pay (after 52 weeks service)
Annual bonus
Annual pay rises
Bike parking
Buy or sell annual leave
Car allowance
Charity donation scheme
Chill out zone
Cinema discounts
Coffee discounts
Collaboration spaces
Company car
Company freebies
Compassionate leave
Critical Illness Insurance
Cycle to work scheme
Death in service
Dental coverage
Discretionary sick pay
Electric Car Salary Sacrifice
Emergency leave
Employee assistance programme
Employee discounts – 10% off and 15% on pay day weekends
Employee phone programme
Enhanced maternity leave – 26 weeks full pay (after 52 weeks service)
Enhanced paternity leave – 6 weeks full pay (after 52 weeks service)
Enhanced pension match/contribution – up to 7.5% matching
Equity packages
Ergonomic workstations
Eye Care Support
Faith rooms
Family health insurance
Fertility treatment leave
Financial advice
Fully stocked snack cupboard
Gym membership
Health assessment
Health insurance
In house training
L&D budget
Learning license
Learning platform
Legal consults
Life assurance – Five times your pay
Life insurance
Lunch and learns
Meditation space
Menopause support
Mental health first aiders
Mental health platform access
Mentoring
Modern office
On-site barista
On-site catering
On-site gym
On-site personal trainer
On-site shower
On-site wellness room
On-site wellness services
On-site workout classes
Open to compressed hours
Open to job sharing
Open to part time work for some roles
Open to part-time employees
Optional unpaid leave
Paid fostering leave
Personal development budgets
Personal development days
Pregnancy loss leave
Private booths
Referral bonus
Religious celebration leave
Relocation packages
Restaurant discounts
Sabbaticals
Salary advance
Salary sacrifice
Secure on-site parking
Sensory-Friendly Setup
Share options
Skilled worker visas
Sports teams
Study support
Teambuilding days
Theme park discounts
Time off in-lieu
Tree planting
Volunteer days
Wellbeing incentive programme
Reservist leave

Working at Tesco

Company employees:

330,000+

Gender diversity (m:f):

49:51

Hiring in countries

Ireland

United Kingdom

Office Locations

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