Sam O'Connor

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Audit

Knowledge and integrity you can rely on.

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Compliance and audit reviews
From mandates, best practice procedures or accreditations, to simply gaining peace of mind, our technical and industry experts have you covered.
External audit
Strengthen business and stakeholder confidence with professionally verified results and insights.
Financial reporting advisory
Deep expertise to help you navigate New Zealand’s constantly evolving regulatory environment.

Tax

The business tax landscape is transforming. Are you ready?

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Corporate tax
Identify tax issues, risks and opportunities in your organisation, and implement strategies to improve your bottom line.
Indirect tax
Stay on top of the indirect taxes that can impact your business at any given time.
Individual tax
Preparing today to help you invest in tomorrow.
Private business tax structuring
Find the best tax structure for your business.
Tax disputes
In a dispute with Inland Revenue or facing an audit? Don’t go it alone.
Research & development
R&D tax incentives are often underused and misunderstood – is your business maximising opportunities for making claims?

Business services

Tailored solutions to help you navigate challenges, seize opportunities and realise your ambitions.

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Management reporting
You’re doing well, but could you be doing even better? Discover the power of management reporting.
Financial reporting advisory
Deep expertise to help you navigate New Zealand’s constantly evolving regulatory environment.
Succession planning
When it comes to a business strategy that’s as important as succession planning, you can’t afford to leave things to chance.
Trust management
Fresh perspectives, practical solutions and flexible support for trusts and estate planning.
Forecasting and budgeting
Prepare for every likely situation with robust budgeting and forecasting models.
Outsourced accounting services
An extension of your team when you need us, so you can focus your time, energy and passion on your business.
Setting up in New Zealand
Looking to set up a business in New Zealand? You’ve come to the right place.

Management consulting

Access experts who can help you build capability, tackle challenges and opportunities, and create lasting success.

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Policy reviews & development
Turn your risks into strengths with tailored policies that protect, guide and empower your business.
Performance improvement
Every business has untapped potential. Unlock yours.
Programme & project management
Successfully execute mission-critical changes to your organisation.
Strategy
Make a choice about your vision and purpose, where you will play and how you will win – now and into the future.
Risk
Manage risks with confidence to support your strategy.

Modern digital resiliency

Build resilience across data, risk, finance and infrastructure with Grant Thornton’s modern digital resiliency framework.

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Modern data protection & recovery
Independent, immutable backups and rapid recovery for cloud, SaaS and on-premises data.
RiskOps
Turn control testing into a strength. Build resilience through reliable assurance.
CtrlOps
Turn control testing into a strength. Build resilience through reliable assurance.
FinOps
Make resilience a financial reality. Control spend, unlock reinvestment.
Cloud InfraOps
Resilient infrastructure, resilient business. Operate with confidence in the cloud.
Digital infrastructure
Strong infrastructure builds resilient businesses.

Related insights:

Insight Modern digital resilience: Providing clarity in an age of disruption

Organisations face growing disruption, complex systems and evolving risks when it comes to managing technology. Here’s how to approach your pathway to resilience.

Robin Cockayne

| 4 min read | 02 Sep 2025

Digital advisory

Start or enhance your digital transformation journey or latest IT project.

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Cloud services
Leverage the cloud to keep your data safe, operate more efficiently, reduce costs and create a better experience for your employees and clients.
Data analytics
Use your data to make better business decisions.
IT assurance
Are your IT systems reliable, safe and compliant?
Cyber resilience
As the benefits technology can deliver to your business increases, so too do the opportunities for cybercriminals.
Virtual asset advisory
Helping you navigate the world of virtual currencies and decentralised financial systems.
Virtual CSO
Security leadership and expertise when you need it.

Finance & funding

Unlock sources of finance, present your case to potential funders and negotiate long-term sustainable relationships.

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Debt advisory
Raise, refinance, restructure or manage debt to achieve the optimal funding structure for your organisation.
Financial modelling
Understand the impact of your decisions before you make them.
Raising finance
Access the best source of funding for your business with a sound business strategy and rigorous planning.
Business valuations
Valuable decisions require valued insights.

Deals

Strategies that drive value and reduce risk.

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Business valuations
Valuable decisions require valued insights.
Mergers & aquistions
Accelerate your growth with a buy-and-build strategy, or sell an entity for the highest possible value.
Transaction advisory
Navigate your next business transaction with confidence.
Capital markets
Going public? Reap the benefits of this major milestone with independent advice at every stage of the process.
Financial modelling
Understand the impact of your decisions before you make them.

Insolvency

Take an early and proactive approach if insolvency is on the horizon.

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Complex and international services
Navigate the complexities of multi-jurisdictional insolvencies.
Corporate insolvency
Achieve fair and orderly outcomes if your business – or part of it - is facing insolvency.

Restructuring & turnaround

Practical solutions for distressed situations.

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Independent business review
Is your business viable today? Will it be viable tomorrow? Give your business a health check to find out.
Litigation support
Straight forward advice from trusted advisors to support litigation and arbitration matters, expert determinations and other specialist hearings.

Forensics

When risk becomes reality, take rapid protective action to get back to business as usual.

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Business valuations
Valuable decisions require valued insights.
Forensic accounting & dispute advisory
Understand the true values, numbers and dollars at stake, as well as your obligations and rights to ensure value is preserved and complexities are managed.
Expert witness
Our expert witnesses analyse, interpret, summarise and present complex financial and business-related issues which are understandable and properly supported.
Investigation services
A fast and customised response when misconduct occurs in your business.

Industries

Financial services

Our unique offering to the financial services sector may be the catalyst you need to take your business forward, safely and prosperously.

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Not for profit

The true measure of society is how it treats its most vulnerable people. Your success is vital to ensuring our country remains a fair and civil one.

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Property & construction

Minimise your risk and cost while maximising your returns for the best chance of success in today’s market.

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Public sector

Our public sector team goes beyond expectations so you can too.

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Retirement villages & aged care

Helping aged care and retirement village operators deliver on their mission and purpose in an increasingly demanding environment.

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Careers

Welcome to the Grant Thornton difference. With our unique culture and opportunities, our organisation is a place where you can grow.

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Working at Grant Thornton

Our culture is what sets us apart. We create an environment where people feel included, where diverse perspectives are valued, and new ideas can thrive.

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Benefits & flexibility
Our people thrive in a vibrant, supportive and inclusive environment, and that includes providing benefits to support you along the way.
Your career development
At Grant Thornton, we embed learning and development into how we work, so you’re supported at every stage of your career.
Diversity, equity & inclusion
Building a diverse, equitable and inclusive culture isn’t just ‘the right thing to do’, it ensures we all feel seen and our differences are valued.

Experienced hires

With a number of years of experience under your belt, you’re now asking: What’s next? At Grant Thornton, you can take your career to the next level.

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The application process
Interested in applying for a role at Grant Thornton New Zealand? Discover the steps in our application process.
FAQs
Find answers to our most commonly asked questions about careers at Grant Thornton New Zealand.

Early careers

Don't start anywhere, start here!

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Graduates
Are you ready to drive your career forward with a passion for business that matches ours?
Internships
If you want a unique chance to explore the different areas of a professional services firm, then look no further than Grant Thornton New Zealand’s internship programmes.
Our service lines
Explore our service lines and how our people feel about Grant Thornton to decide if we're the right fit for you.
The application process
Interested in starting your career with us? Find out more about our application process.
FAQs
Find answers to some commonly asked questions about our early careers programmes.

I simplify tax for my clients so they’re free to focus on what they love to do. As a tax specialist, I work with a wide a range of businesses who have different tax issues and areas of focus. This variety means I can draw on the extensive experience I have across the New Zealand tax system, as well as transfer pricing issues and international tax planning.

I work with a great team of collaborative, experienced advisors in the wider business who provide clients with guidance and insights on all things business. Together, we deliver tailored solutions, value-adding services and rewarding client experiences.

Qualifications

Chartered Accountant (CA) of Chartered Accountants Australia and New Zealand
Graduate Diploma, Professional Accounting, Victoria University of Wellington
Bachelor of Commerce, Victoria University of Wellington

Latest Articles

INSIGHT New tax clarity for mutual associations: Helpful guidance or costly compliance?

The rules around calculating a company’s taxable income are well established. But what if you’re a mutual association – a resident’s association, membership organisation or industry group (among others)?

| 5 min read | 07 Jul 2025

INSIGHT Budget 2025

Our tax and industry experts have cut through the noise to focus on the most significant announcements in Budget 2025, and reveal what they mean for your business.

| 10 min read | 27 May 2025

alert NFP tax alert for Incorporated Societies and other Mutual Associations

Inland Revenue has just released a draft operational statement (ED0265) about the income tax treatment of transactions between not-for-profit associations (Mutual Associations) and their members.

| 2 min read | 02 May 2025

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Sam O'Connor

Partner, Tax

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