Mariane Nifas Dietrich

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Audit

We advise a wide range of clients and their financial stakeholders, from fast growing and established businesses to public companies competing in global...

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Sector Focus
We specialise in the investment management industry offering audit, assurance, tax and corporate recovery and liquidation services.

Tax

At Grant Thornton, tax is a key part of our organisation and our award-winning teams can offer you a range of solutions, whatever the size of your business or...

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Personal Tax Services
There are many tax rules that can affect you personally and therefore which will have an impact on your personal wealth.
QI Compliance
Qualified Intermediaries (QI) have to take action now to perform a Certification to the Internal Revenue Service (IRS).
Download our tax brochures
The tax teams at Grant Thornton aim to provide the Channel Islands with a premier tax advisory service both to private clients and the business community including the investment management industry.
Jersey Tax Return
A secure sign in page to file Jersey Tax Returns through the Grant Thornton tax portal.

Business Advisory Services

We work with a broad range of clients and their financial stakeholders, from entrepreneurs in the early days to fast growing and established businesses to...

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ESG
ESG can either be seen as a risk management tool or an opportunity, either way it is imperative to your business, whatever your size and whether you are listed or not.
Professional Services
Business and accounting support for professional services
Finance Industry
We work with a broad range of clients and their financial stakeholders, from entrepreneurs in the early days to fast growing and established businesses to public companies competing in global markets.
Local Businesses
Businesses come in many shapes and sizes – from innovative start-ups to long-established local businesses. But however large or small your business, the chances are you face similar challenges.

Recovery & Reorganisation

We supply a wide range of services to under-performing businesses and their stakeholders. We focus on identifying and resolving issues affecting profitability,...

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Corporate Insolvency
Our corporate investigation, Guernsey liquidation and recovery teams focus on identifying and resolving issues affecting profitability, protecting enterprise value and facilitating a full recovery where possible.
Corporate Simplification
Redundant corporate entities can over complicate group structures and waste thousands of pounds in unnecessary costs each year. 46% of the c.15,500 companies controlled by the FTSE100 are dormant and it is estimated that the average cost of administering dormant companies is between £3,500 and £5,000 per company, per year.
Debt Advisory
Our Debt Advisory team provides commercial and financial debt advice to corporate entities and public sector bodies in a range of sectors. Our engagements include advice on stand-alone transactions and solutions or as part of an integrated business plan, in both the project and corporate arenas.
Exit Strategy Services
We offer a tailored methodology designed to enable a company to be reviewed in a group context to assess ways to maximise its value.
Financial Restructuring
For companies challenged by under-performance we work with management teams, shareholders, lenders and other stakeholders to implement financial restructuring solutions creating a stable platform for business turnaround.
Strategic performance reviews
Strategic performance reviews analyse the key drivers of performance improvement. Our specialists utilise a framework to evaluate financial and operational options and to identify solutions for businesses and their stakeholders.

Forensic & Investigation Services

Heightened financial distress, globalisation (where companies play a pivotal role on the world stage) and increased regulation has led to an increase in the...

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Financial Reporting Advisory Group

For most companies, the responsibility to comply with the twists and turns of financial reporting obligations is an ever increasing, and sometimes dizzying...

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Regulatory Consulting

Grant Thornton Regulatory Consulting team provides assistance at all stages to financial services businesses.

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Business Risk Services

Regulatory interventions, an everchanging business environment with increased complex challenges, have a significant impact on business risk.

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Mariane is an Audit Director in Jersey with 18 years of experience in providing audit and assurance services across multiple jurisdictions, including the Channel Islands, Hong Kong and the Philippines.

Mariane specialises in auditing financial services clients, such as banks, fiduciaries and a wide range of entities within the asset and wealth management industry.

Mariane has worked with numerous regulated entities in Jersey and is also experienced with audits of UK companies and exchange-listed entities.

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Mariane Nifas Dietrich

Audit Director

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