Our practice

Walsh O’Brien Harnett is a professional advisory firm – one of Ireland’s top 20 accountancy practices – comprising chartered accountants, registered auditors and chartered tax advisors. Led by a young and dynamic team of five partners, we are a modern practice built on the foundations of almost 70 years’ experience.


We are a full-service firm offering a wide range of accounting, audit, tax, advisory and corporate services; though we like to think we are much more than a list of services. Our goal is to be the trusted advisor of choice to our clients, acting as their partners whenever they need advice and expertise, or even just a sounding board for ideas.

Our clients

Our clients are at the heart of everything we do. We aim to build long-term relationships and are personally invested in our clients’ success – in many cases we are now working with the third generation of family business owners. Our client service standards are an area of continual focus for both partners and staff. We strive to consistently provide our clients with best-in-class service, going above and beyond at every opportunity.

We have a varied client base of businesses, not-for-profit organisations and individuals across a wide range of industries and sizes. Our corporate clients range from entrepreneurial growth businesses, through established companies with turnover in the tens of millions, to multinationals. Our charity and not-for-profit clients include religious congregations, schools, and community support organisations.

Our clients

Our international connections

We are a proud member of PrimeGlobal, an international association of independent accounting firm with approximately 300 members in over 80 countries. PrimeGlobal is one of the five largest associations of independent accounting firms in the world, providing a wide range of tools and resources to help member firms furnish superior accounting, auditing, and management services to clients around the globe.

About PrimeGlobal

Strong foundations

Walsh O’Brien Harnett was established in 2016 following the merger of two long-established accountancy firms – O’Brien Harnett & Associates and Sherry McNabola Murray & Co.

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