Integration & Transformation Manager – Strategy & Transformation

Grant Thornton Advisors LLC and Grant Thornton Ireland (GT) have recently come together to form a powerful multinational, multidisciplinary platform that delivers premier advisory, tax, and independent audit services. With $2.7 billion in revenues and nearly 60 offices across the U.S., Ireland, the UAE, and other territories, our combined platform brings enhanced solutions and capabilities supported by cutting-edge technologies and a team of nearly 13,000 quality-driven professionals.

Grant Thornton Ireland contributes nearly 3,000 people across 9 offices in Ireland, the Isle of Man, Gibraltar, and Bermuda, and is part of a global network of over 68,000 professionals spanning more than 149 countries. Together, we offer a truly global reach backed by deep local knowledge and national expertise.

By joining forces, we strengthen our ability to act as trusted advisors who make business more personal — investing in relationships and empowering clients to make the right decisions for their organisations today and into the future. Whether working with the public sector to build thriving communities, partnering with regulators and financial institutions to build trust, or supporting diverse businesses to achieve their goals, Grant Thornton now provides a singular, seamless client experience grounded in collaboration, innovation, and a shared commitment to the issues that matter most.

At GT Ireland we don’t just predict your future, we build it.

A Career at GT

Looking for a more fulfilling role in professional services? One where fresh thinking, collaboration and diversity are valued? At Grant Thornton we do things differently.

What does this mean for you?

A career in a more inclusive working environment, a more collaborative work culture, a more supported, flexible working role, more possibilities to grow and more opportunities to help shape the future for your clients. We respect and value your experience. And we want you to bring your authentic self to work and be at your best. It is how it should be.

Grow with us

At Grant Thornton, we care about our people and work hard to make you feel valued. If you are looking to deepen and develop your skills, knowledge, and experience throughout your career, then that is what you will get, and more

The Role - Description

As a key member of our Integration Management Office (IMO), you will play a central role in delivering multiple strategic integrations across our expanding multinational platform. You will work closely with executive and functional leaders from firms joining the platform to ensure that integrations are executed efficiently, deliver value, and preserve cultural alignment.

This is a hands-on role requiring strong project management, structured thinking, and the ability to operate in fast-paced, cross-border environments. You will work alongside the Integration Director and senior leadership to define integration strategies, set the “drumbeat” for execution, and manage dependencies across functions such as Finance, People & Culture, Operations, Technology, and Risk & Legal.

This role is a dynamic position and will give you an opportunity to travel, learn new cultures and create a truly differentiated integrated professional services firm.

Key Responsibilities:

Pre-Merger Integration Planning

Partner with the transaction team during due diligence to identify key integration considerations and ensure they are factored into the deal process.
Develop detailed Day 1 and 120-day plans, governance structures, milestones, and deliverables.
Prepare and adapt integration playbooks, templates, and dashboards to support consistent delivery.
Establish integration reporting, flash updates, and risk/issue logs in line with IMO standards.

Post-Merger Integration

Act as Integration Project Manager for assigned transactions, ensuring seamless execution and continuity from pre- to post-close.
Lead cross-functional teams to align on milestones, manage interdependencies, and track progress against defined KPIs.
Drive synergy identification and capture — including operational improvements, collaboration wins, and process optimisation.
Maintain effective communication with internal and external stakeholders, ensuring transparency and alignment.
Support the Global Head of Integration and platform leadership with regular reporting, pulse checks, and issue resolution.

Post-Acquisition Issue Resolution

Manage and resolve post-closing matters such as legal or financial adjustments, surplus assets, earn-outs, and integration-related risks.
Establish processes and ownership for ongoing monitoring and resolution of post-acquisition issues.
Conduct post-integration reviews to capture lessons learned and recommend improvements to future integrations.

Transformation & Continuous Improvement

Support broader transformation initiatives across the platform, leveraging integration insights to improve governance, systems, and ways of working.
Champion cultural integration and change management activities to embed shared values and promote collaboration across geographies.

Key stakeholder relationships

Firm’s executive team and integration lead
Global GTA workstream leads
IMO Strategic Lead on respective integrations (paired collaboration model)

Experience & Qualifications

Bachelor’s degree required; MBA or equivalent postgraduate qualification preferred.
Minimum of 4+ years’ experience in integration, transformation, or large-scale strategy/change programmes - ideally within professional services or an international business environment.
Demonstrated ability to manage complex projects with multiple stakeholders, strict deadlines, and competing priorities.
Strong analytical and problem-solving skills; able to translate data into actionable insights.
Excellent communication and influencing skills, with experience engaging senior stakeholders across multiple jurisdictions.
High emotional intelligence, cultural awareness, and curiosity to learn from diverse teams.
Experience working with or within PE-backed organisations is advantageous.
Willingness to travel internationally as required (approx. 30%).

Life at GT

Reward and benefits:

Our reward and benefits are designed to create an environment where our people can flourish. We are committed to building a culture where our people have access to the necessary benefits to help promote a healthy lifestyle and thrive.

Equity, diversity and inclusion
At Grant Thornton, we provide equitable opportunities for all our colleagues. We are a responsible, sustainable business where equity, diversity and inclusion (ED&I) is at the forefront of our workplace culture agenda, and today, we continue to build and develop on our existing ED&I structure and strategy to meet our workplace culture needs. People are at the heart of our business and teams built with varied backgrounds, racial differences, cultures, sexual orientations, religious orientations, ages, gender identities, abilities and family types present diverse viewpoints, which need to be heard and valued.

We are all at our best when we are able to be ourselves and we view integrity and authenticity as integral values to bring to our day-to-day work-life at the firm. We are excited to see the personality and perspectives you will bring to our team because we know we will all benefit from them. Diversity of thought, background and experience enables better decision-making, improves the quality of our delivery, and helps us to meet the needs of our clients. Our firm is built on people and their ideas, so we want to hear all the new perspectives and fresh thinking you have to offer. You form the bedrock of our firm’s best-practice principles and we will champion you as leaders from day one.

Recognition:

We want to create a culture of recognition and celebrating success, by saying thank you to people who surpass our expectations and recognising the right values and behaviours. Our Shout Out recognition scheme is our way of highlighting and promoting achievements. Whether you simply want to say thank you, celebrate a special occasion or give an award for doing something exceptional, you can do all of this and more through the scheme.

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Integration and Transformation Manager

Job Description