Systems Engineer III

About the roleThis role sits within the workplace Identity team which ispart of the Tesco Workplace Technology engineering team, part of aglobal engineering function delivering secure, scalable, and modern workplacesolutions for Tesco colleagues. As a senior engineer and domain expert in Identitytechnologies, you will lead the full technology lifecycle — from strategyand design through to engineering, testing, and delivery — for the servicesthat underpin our digital colleague experience.You will be responsible forStrategic LeadershipAct as a senior engineer for Identity within the Workplace Technology team, setting the direction, roadmap, and architectural standards for core identity services including Active Directory, Entra ID, PKI, and modern authentication protocols.Align identity strategy to Tesco's broader digitalworkplace vision, collaborating closely with architects, product managers,security, and infrastructure teams.Stay ahead of market trends and emergingtechnologies in identity and access management, advocating for theiradoption where beneficial.Engineering & DeliveryDesign and deliver secure, scalable identityplatforms that support global business needs and enable modern digitalworkplace capabilities.Engineer solutions across the identity lifecycle:concept, evaluation, prototyping, testing, production deployment, andservice transition.Implement automation, codification (IaC), andintegration with CI/CD practices to drive efficiency and resilience.Act as a senior escalation point for complex issuesrelated to authentication, replication, certificate lifecycle, hybrididentity, and directory services.Operational ExcellenceBuild systems that are secure, stable, and easyto operate, with monitoring, alerting, and lifecycle planning embeddedby design.Champion remediation of legacy identity componentsand uplift the security and operational posture of all identity services.Ensure knowledge is well documented and transitionssmoothly into operational support with clear SLAs and handover practices.Governance & SecurityDrive adoption of Zero Trust principles, secureadmin tiering, modern auth standards, conditional access, and multifactorauthentication.Own the health, design, and policy of PKIinfrastructure and associated services (including certificate templates,CRLs, and HSMs).Work closely with the Security and Risk teams toensure compliance with internal controls, regulatory obligations, andaudit findings.Leadership & InfluenceRepresent Workplace Technology IdentityEngineering across Tesco Technology and into broader cross-functionalinitiatives.Lead by example in engineering excellence,stakeholder engagement, and mentoring of less experienced engineers.Promote a culture of simplification, technicalrigour, and continuous improvement.You will needDeep expertise in:Active Directory: design, hardening,replication, domain controller lifecycle, GPOs, admin tiering.Azure AD / Entra ID: hybrid identity,conditional access, MFA, identity protection, SSO, SCIM.Public Key Infrastructure (PKI): policy,lifecycle, templates, automation, CRL/OCSP, HSMs.Authentication protocols: OAuth2, OpenIDConnect, SAML, Kerberos, NTLM, WS-Fed.Demonstrated ability to design and deliver identityplatforms in large, complex environments.Understanding of identity's role in enterprisesecurity frameworks and compliance requirements.Proficiency with scripting and automation tools(PowerShell, Terraform, etc.).Familiar with monitoring, backup, recovery, and DRpractices for identity systems.Ensure identity services are designed with built-inresilience, supporting high availability, fault tolerance, and fastrecovery across hybrid environments.Contribute to and maintain Business ContinuityPlans (BCPs), ensuring critical identity components are documented withclear recovery priorities.Design and validate Disaster Recovery (DR)strategies for directory services, authentication systems, and PKI, withregular failover testing and documented RTO/RPO.Whats 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. Click Here to find out moreAnnual 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 4 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 About UsOur vision at Tesco is to become every customer's favourite way to shop, whether they are at home or out on the move. Our core purpose is 'Serving our customers, communities and planet a little better every day'. Serving means more than a transactional relationship with our customers. It means acting as a responsible and sustainable business for all stakeholders, for the communities we are part of and for the planet.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.