UAT Test Manager - SAP S/4HANA Transformation

We are seeking an experienced UAT Test Manager to join a large-scale SAP S/4HANA transformation and migration programme for a major public sector organisation. This is a high-profile role requiring an experienced test professional who can operate confidently at senior stakeholder level, lead business users through a complex UAT programme, and manage multiple third-party suppliers and vendors. You will take ownership of the UAT strategy and delivery across the programme, ensuring the organisation is fully prepared to validate the new SAP S/4HANA solution and transition successfully into business-as-usual operations., * Own and lead the User Acceptance Testing (UAT) strategy, planning and execution across the SAP S/4HANA transformation and migration programme.

• Develop and maintain the UAT approach, including scope, entry/exit criteria, test cycles, environments, data requirements, resources and governance.
• Lead and coordinate UAT activities across multiple business functions and stakeholder groups.
• Work closely with senior stakeholders, business leaders and subject matter experts to define business acceptance criteria and ensure appropriate test coverage.
• Manage and coordinate large groups of business users through UAT, ensuring they are appropriately prepared, supported and engaged.
• Establish effective test governance, reporting, defect management and escalation processes.
• Provide clear and concise reporting on UAT progress, risks, issues, defects, dependencies and readiness to senior programme leadership.
• Manage relationships with third-party implementation partners, testing suppliers and technology vendors, ensuring contractual and programme testing commitments are delivered.
• Challenge vendor test strategies, plans and results where necessary, ensuring appropriate quality and evidence of testing.
• Coordinate defect triage and resolution across business users, SAP teams, technical teams and third-party suppliers.
• Ensure critical business processes and end-to-end scenarios are adequately tested across the SAP S/4HANA solution.
• Work closely with the wider Programme, PMO, Change, Data, Technical and Business teams to ensure UAT is aligned with the overall transformation plan.
• Support cutover and go-live readiness by providing clear assessments of UAT completion and business acceptance.
• Identify and proactively manage testing risks, dependencies and resource constraints.
• Ensure appropriate test evidence, documentation and audit trails are maintained in line with public sector governance requirements.
• Lead UAT readiness and go-live decision-making forums where required.

You will be an experienced UAT/Test Manager with a strong track record of delivering business-led testing within complex transformation programmes. You will be comfortable operating in a highly stakeholder-focused environment and able to build credibility with senior leaders, business users, technology teams and external suppliers. Essential Experience

• Significant experience working as a UAT Test Manager / Test Manager on large-scale transformation programmes.
• Proven experience managing UAT across complex, business-critical programmes.
• Strong experience working with senior stakeholders and business users, including senior leadership and functional representatives.
• Proven experience managing third-party vendors, systems integrators and testing partners.
• Strong understanding of end-to-end business process testing and acceptance.
• Excellent stakeholder management, communication and influencing skills.
• Experience managing test teams, business testers and distributed testing communities.
• Strong knowledge of defect management, test governance, reporting and risk management.
• Experience working within complex, highly governed organisations.
• Ability to operate effectively in a large programme environment with multiple workstreams and competing prioritie

Desirable

• Previous experience within the public sector or another highly regulated environment.
• Experience with SAP S/4HANA migration or transformation programmes.
• Experience with SAP business processes such as Finance, Procurement, HR, Supply Chain or related functions.
• Experience supporting cutover, deployment and go-live readiness.
• ISTQB, ISEB or equivalent testing qualification.
• Experience working with structured programme governance and formal assurance processes.

What You’ll Bring We are looking for someone who is credible, pragmatic and commercially aware, with the ability to balance the needs of the business with the requirements of a complex technology transformation. You will be confident challenging senior stakeholders and third-party suppliers when required, while maintaining strong relationships and keeping the programme focused on successful delivery.

About Resillion Resillion is a global provider of digital assurance, cybersecurity, and testing services. We help organisations strengthen their security posture, protect critical assets, and deliver high-quality digital solutions. Our teams operate across multiple specialist disciplines, including Digital Forensics, Incident Response, SOC Operations, Quality & Compliance, and Technical Consultancy. We are committed to excellence, continuous improvement, and delivering trusted, customer-focused services that meet the highest professional and accreditation standards.