About OSK

OSK have been providing quality and professional business advice to Irish businesses since 1985. Based in Dublin, we specialise in progressive owner managed businesses and our clients include SMEs, multi-national groups; government bodies, sole traders and contractors. 

Our vision is to be the most progressive and client focused accountancy and business consultancy firm in Ireland.

By engaging with OSK you can expect:

Integrity, independence and impartiality this is the foundation of everything we do.

Service Quality we deliver excellent quality accounting services through understanding our clients and their needs. As the first Irish accountancy firm to achieve the internationally recognised ISO 9001:2000 standard, we appreciate the value of service excellence and we continually strive to lead the industry in this area.

Client Partnerships We are client focused, and endeavour to develop client relationships to ensure that we understand our clients business.

Range of Services We cater for all business requirements through, both our in-house team of specialists and our strategic partners providing the full range of services needed to help our clients’ business succeed. Our services include audit and accounting, accountants for contractors, company secretarial, small business support, company set-up, taxation, payroll, bookkeeping and management accounting. We also aim to build our range of services in keeping with clients’ needs and market requirements.

Accessibility we understand that access to partners and senior specialists is essential to excellent client servicing.

Call Irelands leading acounting firm today to find out more about our accounting services. 


Welcome to OSK

A video message from Tadgh O'Sullivan, Director.

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Please note we cannot provide advice unless you are signed up as a client having completed the required money laundering documents, engagement letter has been issued to you and fee agreed.