SAP S4/Hana Senior Test Manager

JR United Kingdom; Slough; On-site; GBP 60,000 - 85,000; Full time

Job summary

A leading company is seeking a Senior Test Manager to drive testing for a major SAP S/4HANA transformation. This role involves shaping test strategies, collaborating with global teams, and ensuring quality delivery in a fast-paced environment. Candidates should possess significant ERP/SAP experience with robust organizational skills.

Benefits

Best-in-class learning and development support

Industry competitive salary and benefits package

Access to in-house Mars University

Qualifications

• 5+ years in ERP/SAP transformation roles, focusing on test planning.
• Experience with SAP S/4HANA testing standards and methodologies.
• Proven ability to manage complex timelines and communicate effectively.

Responsibilities

• Lead the SAP S/4HANA Digital Core Testing Team across all phases.
• Develop and manage comprehensive test strategies and plans.
• Integrate test automation tools to improve coverage and efficiency.

Skills

Stakeholder communication

Project management

Agile methodologies

Test planning and execution

Test automation

Tools

JIRA

ServiceNow

eCATT

SAP Solution Manager

Job description

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Location: UK (London, Slough), US

Mars is driving a large-scale digital transformation through the implementation of SAP S/4HANA across our global segments—Petcare, Snacking, Food, and Corporate. This program goes far beyond a system upgrade. It's a business-wide evolution focused on simplifying and harmonizing core processes.

To support this, we’re hiring a Senior Test Manager to lead testing across the S/4HANA landscape. You’ll shape our test strategy and execution, ensuring our new systems are robust, scalable, and meet the highest quality standards.

You’ll play a key role in a global program that requires collaboration across multiple markets and functions. This role is pivotal to ensuring a smooth transition to SAP S/4HANA, with responsibility for aligning test activities across all segments (Petcare, Corporate, Snacking, and Food).

What will be your key responsibilities?

• Model and promote Mars’ Five Principles in all interactions.
• Lead the SAP S/4HANA Digital Core Testing Team across all phases (unit, SIT, UAT, go-live validation).
• Develop, implement, and manage detailed test strategies and plans aligned with project timelines and stakeholder needs.
• Oversee test execution, coordinate environments, and manage defect tracking and resolution.
• Integrate test automation tools and practices where possible to enhance coverage and efficiency.
• Collaborate with functional and technical teams, system integrators, and business stakeholders to align on test goals and requirements.
• Produce clear, actionable test reporting and insights for leadership and teams.
• Effectively allocate testing resources and manage team capacity to ensure quality delivery on time and within budget.
• Drive continuous improvement by introducing testing best practices and learning from each release.
• Utilize testing tools such as JIRA, ServiceNow, eCATT, and SAP Solution Manager to manage testing activities.

What are we looking for?

• 5+ years in ERP/SAP transformation or implementation roles, with strong experience leading test planning and execution.
• In-depth understanding of SAP S/4HANA testing standards and delivery methodologies (agile, hybrid, or waterfall).
• Experience working in complex, global programs with cross-functional teams.
• Strong organizational skills with a proven ability to manage timelines, dependencies, risks, and testing outcomes.
• Skilled in stakeholder communication, status reporting, and managing third-party and vendor collaboration.
• Proactive, team-oriented, and comfortable working in a fast-paced, delivery-focused environment.

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 company bonus.