Jean Tuffy

Senior Manager

Jean is a member of Chartered Accountants Ireland (ACA) and has over 7 years’ experience in private practice. Her knowledge and expertise extends to auditing, advisory services, accounting technical issues and regulatory requirements. She has a strong background and experience with audit methodologies and techniques. In her time in practice she has managed a variety of assignments across the public and private sectors. She maintains and develops existing client relationships and contributes to the development of new business opportunities.

Robert Halley


Tax Manager

Robert is an Associate of the Irish Taxation Institute (CTA) and has extensive experience within private practice. He is responsible for the tax compliance function of both our individual and corporate client bases     and in addition to this provides guidance on advisory issues arising across all tax heads. Having worked with a variety of practices in the past he has gained a depth of knowledge in many areas such as succession planning, issues relating to mobile workers, and VAT on property transactions.


Anthony Teehan 



Anthony is a Fellow of the Association of Chartered Certified Accountants (FCCA) with over 18 years’ experience in professional practice. He specialises in providing audit and advisory services to a broad range of clients in the private sector. Anthony is involved in leading audits and ensuring high quality and superior client service objectives are achieved. He has strong knowledge and interest in audit and accounting technical issues and regulatory requirements.


Gustavo Renero


Assistant Manager

Gustavo is a Fellow of the Association of Accounting Technicians in Ireland (IATI) and manages the Corporate Secretarial services for clients of the firm. This dedicated company secretarial service is designed to support the management and growth of our client companies throughout their life-cycle from company incorporation to wind-up. He also deals with the preparation of management accounts and bookkeeping matters for groups of companies and assists clients with day to day issues such as cash management and payroll. Gustavo has over 15 years’ experience in private practice.


Fiona Clancy


Assistant Audit Manager

Fiona is a member of the Chartered Accountants Ireland (ACA) and has a Master’s Degree in Science (Accounting). Fiona has over 6 years’ experience in private practice which has led to an excellent work ethic, clearly demonstrated by the high standard of her work in the accounting industry. She has particular skills in external audits and internal controls. Fiona possesses notable communication and interpersonal skills which aids her in her interactions and discussions with the clients.

Brian Mulcahy


Assistant Manager

Brian is a member of the Chartered Accountants Ireland (ACA) and also hold a Master’s Degree in Accounting. Brian has been a member of Duignan Carthy O’Neill for over 4 years and during this time, he has proven his skills in various areas of the firm including auditing, tax and financial reporting.  In working with our clients, Brian demonstrates his ability to provide advice and professional insight to meet our clients' needs and expectations. 

Corentin Petit


Senior Management Accountant

Corentin is a French national who grew up in France and qualified as a ‘Diplômé d’expertise comptable’ in France. He now lives and works in Ireland where he provides advice on accounting, tax and payroll issues to local and international businesses across a wide range of industries. He worked in professional practice for five years in France and since January 2019 he has been based in Dublin helping private clients, especially French speakers to establish and grow businesses in Ireland. Corentin is perfectly qualified to assist any French or francophone businesses looking to establish a business in Ireland – for the local Irish market or as a base to expand to Europe and beyond. He understands both French and Irish accounting and tax regulation and is perfectly bilingual.

Corentin est diplômé d’expertise comptable en France, il vit désormais en Irlande et prodigue des conseils comptables, fiscaux et sociaux à diverses sociétés locales et internationales. Fort de plus de cinq années d’expérience au cours desquelles il a conseillé de nombreuses sociétés depuis leur création, il est particulièrement compétent pour accompagner des entrepreneurs francophones sur leur implantation en Irlande – pour des activités basées en Irlande ou comme base pour s’étendre sur des marchés Européen et mondiaux. Il a une grande éthique de travail ainsi qu’un excellente connaissance des normes comptables et fiscales.

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