Senior Manager, MandA Integration

Arm’s Integration Management Office (IMO) leads some of the company’s most strategically important change initiatives, including mergers and acquisitions, divestments, organisational transformations, and enterprise-wide improvement programmes.

We are seeking a highly capable Senior Manager, M&A Integration to manage complex cross-functional programmes that enable successful business transitions while minimising operational disruption. The role will lead integration, separation, and transformation initiatives from planning through execution, partnering with senior leaders across the company to deliver measurable business outcomes.

This position requires a strong blend of programme leadership, stakeholder management, operational excellence, and change management experience. The successful candidate will be comfortable operating in highly ambiguous environments, influencing senior stakeholders, and driving alignment across diverse global teams. Responsibilities:

• Lead post-acquisition integrations, divestments, and business transformation programmes.
• Develop and manage programme plans, governance structures, risks, dependencies, and success measures.
• Coordinate global cross-functional teams across Engineering, People, IT, Finance, Legal, Operations, Sales, and Marketing.
• Drive Day 1 readiness, transition planning, operational continuity, and long-term value delivery.
• Establish executive governance forums and provide clear reporting and insights to senior stakeholders.
• Support strategic initiatives and cross-organisation programmes with SoftBank Group entities where required.
• Lead change management and stakeholder engagement activities to ensure successful adoption and outcomes.

• Significant experience leading large-scale, cross-functional programmes in a global technology environment.
• Proven track record delivering M&A integrations, divestments, business transformations, or complex change initiatives.
• Strong programme management skills, including governance, planning, risk management, and executive reporting.
• Exceptional stakeholder management and communication skills, with experience influencing senior leaders.
• Strong problem-solving abilities and comfort working in fast-paced, ambiguous environments.
• Bachelor’s degree or equivalent experience.

‘Nice to Have’ Skills and Experience:

• Experience in the semiconductor, technology, software, or engineering sectors.
• Knowledge of post-merger integration methodologies and operating model design.
• Programme management certifications (PMP, MSP, PRINCE2, Agile, etc.).
• MBA or relevant postgraduate qualification.

At Arm, collaboration drives progress. Our culture blends individual ownership with strong team alignment, where skilled people thrive in a fast-paced, supportive environment. Across our ecosystem, we value bold thinking and pushing boundaries because when teams are empowered and passionate, they deliver at scale. Read more

• Diversity, Equity & Inclusion This is Collective Progress Arm drives progress by enabling bold ideas to emerge from a diverse, skilled, and inclusive workforce. We challenge convention and move fast, supported by active participation in ERGs, employee communities, DEI working groups, and the DEI Council, each built to fuel momentum and remove barriers. Read more

• Benefits at Arm Benefits Designed for You Arm moves fast because our people do. That’s why we offer high-impact benefits tailored to support those driving the future of computing, benefits that reflect and reward the ambition, skill, and energy of extraordinary teams solving complex challenges. Read more

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At Arm, we want to build extraordinary teams. If you need an adjustment or an accommodation during the recruitment process, please email . To note, by sending us the requested information, you consent to its use by Arm to arrange for appropriate accommodations. All accommodation or adjustment requests will be treated with confidentiality, and information concerning these requests will only be disclosed as necessary to provide the accommodation. Although this is not an exhaustive list, examples of support include breaks between interviews, having documents read aloud, or office accessibility. Please email us about anything we can do to accommodate you during the recruitment process.

Hybrid Working at Arm

Arm’s approach to hybrid working is designed to create a working environment that supports both high performance and personal wellbeing. We believe in bringing people together face to face to enable us to work at pace, whilst recognizing the value of flexibility. Within that framework, we empower groups/teams to determine their own hybrid working patterns, depending on the work and the team’s needs. Details of what this means for each role will be shared upon application. In some cases, the flexibility we can offer is limited by local legal, regulatory, tax, or other considerations, and where this is the case, we will collaborate with you to find the best solution. Please talk to us to find out more about what this could look like for you.