Data Migration Senior Lead in Slough

At Mars, Incorporated, we’re transforming how we operate globally — and we’re looking for a Data Migration Senior Lead to play a critical role in one of our most ambitious digital programmes yet. Mars is a family-owned business with over $50 billion in global sales, operating in 80+ countries and home to iconic brands like M&M's, SNICKERS, TWIX, PEDIGREE, and ROYAL CANIN. Guided by our Five Principles — Quality, Responsibility, Mutuality, Efficiency, and Freedom — our 150,000 Associates are building the world we want tomorrow.

The Opportunity

As part of our global SAP S/4HANA transformation programme, we’re driving far more than a simple system upgrade. This is a full-scale process simplification and harmonisation initiative across our segments: Corporate Food. We are transforming eight major process areas including Finance, Source to Pay, Plan to Fulfil, Lead to Cash, Governance, Marketing, R&D, and HR. To enable this transformation, we are seeking a Data Migration Senior Lead to own and drive the end-to-end data migration strategy across the S/4HANA landscape.

What You’ll Own

• You’ll lead the Data Migration workstream — from strategy to cutover — ensuring quality, governance, and seamless execution.
• Key responsibilities include:

• Defining and driving the overall data migration strategy and roadmap
• Leading planning, scope, governance, and quality control across the workstream
• Designing data extraction, transformation and load (ETL) approaches
• Overseeing tooling, templates, scripts, and repeatable migration processes
• Ensuring robust data quality controls, cleansing and compliance
• Coordinating mock loads, reconciliation, testing cycles (SIT/UAT), and cutover rehearsals
• Producing migration registers, load plans, status reporting, and cutover documentation
• Supporting go-live and ensuring successful validation and sign-off

This role requires strong stakeholder management across global, cross-segment teams and third-party partners.

What We’re Looking For

• Experience: 5–10 years leading SAP data migration in large-scale ERP or S/4HANA programmes
• Experience delivering at least 3 full lifecycle global SAP transformations
• Technical Expertise: Strong knowledge of SAP master and transactional data (Material Master, Customer/Vendor, BOMs, FI/CO, Sales & Purchase Orders)
• Hands‑on experience with:

• SAP S/4HANA Migration Cockpit
• Syniti Advanced Data Migration & Management (ADMM)
• Deep understanding of ETL processes, validation and reconciliation
• Proven experience managing mock loads and cutover rehearsals

What can you expect from Mars?

• Work with diverse and talented Associates, all guided by the Five Principles.
• Join a purpose‑driven company, where we’re striving to build the world we want tomorrow, today.
• Best‑in‑class learning and development support from day one, including access to our in‑house Mars University.
• An industry‑competitive salary and benefits package, including a company bonus.

Mars is an equal opportunity employer, and all qualified applicants will receive consideration for employment without regard to race, colour, religion, sex, sexual orientation, gender identity, national origin, disability status, protected veteran status, or any other characteristic protected by law. If you need assistance or an accommodation during the application process because of a disability, it is available upon request. The company is pleased to provide such assistance, and no applicant will be penalised as a result of such a request. If you’re passionate about data, governance, and driving transformation at scale — this is your opportunity to shape the future of Mars.