Head of Service Reliability Engineering

Distinguished Engineer / Head of Service Reliability Engineering - SCS1 This role can be located in any of the following locations: London (Stratford), Leeds, Telford, Newcastle & Bristol. HM Revenue and Customs (HMRC) is the UK’s tax and customs authority. We are one of the largest organisations in the country, with more than 70,000 employees, and we collected £938.8 billion in tax receipts in 2025-26. Our work touches the lives of almost everyone in the country. The tax revenue we generate is spent by the government on the schools, NHS, police, and other essential services we all rely on. Our vision is to be a trusted, modern, tax, and customs department – one that is here to support customers and works to close the tax gap. To achieve this, we are driving forward vital changes that will make us more efficient in serving our customers and managing their compliance. We’re investing in our technology, our people and their skills to make it as easy as possible for customers to pay the right tax from the outset: expanding and improving our digital services, enhancing customer experiences and fixing problems at source, so we can focus our interventions where they make the biggest difference. This is a rare opportunity to shape reliability engineering across one of the UK’s largest and most important digital estates. Enterprise Live Services (ELS) at HMRC is evolving into a modern, engineering-led organisation - enabling HMRC to deliver change faster while strengthening reliability, resilience, and trust. As Head of Service Reliability Engineering, you will lead a distinct, independent capability spanning services, products, and platforms. You will make reliability, operability, and observability integral to engineering from the outset. With enterprise-wide reach and influence, you will set the direction for SRE, raise service maturity, and build a lasting capability that enables teams to innovate safely and operate with confidence. This executive-level role has accountability for: Enterprise Reliability Strategy and StandardsService Maturity Model OwnershipObservability and Evidence-Based AssuranceCoaching, Enablement, and Capability UpliftIndependent Insight and ChallengeCross Government and Industry Engagement The following aspects of the role will be key to your success: Technical Leadership: Provides senior technical leadership in enterprise-scale Reliability Engineering, with the credibility to influence architecture, set standards, and deliver reliability outcomes in complex, regulated environments.Site Reliability Engineering (SRE): Leads the adoption of SRE practices, using SLOs, error budgets, and reliability metrics to drive measurable improvements in service performance and operational decision-making.Observability: Establishes and governs enterprise observability capabilities, using telemetry, dependency mapping, and modern monitoring platforms to improve operational insight and decision quality.Resilience and Recovery: Designs and embeds resilience practices that validate recovery capabilities, identify operational risks, and strengthen service continuity through testing and evidence-based improvements.Secure-by-Design Operations: Integrates security and reliability disciplines by using security intelligence, risk indicators, and close collaboration with cyber teams to enhance service operability and resilience.Cloud and Platform Engineering: Applies deep expertise in cloud-native and platform-based technologies to assess and mitigate reliability risks associated with architecture, platforms, and continuous delivery environments.Service Maturity and Assurance: Develops and applies service maturity frameworks that use evidence-based assessment to inform risk, investment, and operational decisions rather than relying on compliance measures.Executive Stakeholder Management: Communicates complex technical risks clearly to senior stakeholders and uses objective evidence to influence strategic decisions at Director and Executive level This role is open to public sector and private sector candidates and would suit someone with experience of working within enterprise-scale organisations as an Engineering Leader. For further information or to apply, email HMRC-SRE@global-resourcing.com or contact Lawrence Harris on 020 8253 1806 to arrange an informal conversation