Our History

Established in 1971 by Declan Gilroy and Joe Gannon, Gilroy Gannon Chartered Accountants Sligo has grown into the leading accounting firm in Sligo and the north west.

Throughout some 40 years the firm has grown to provide excellent service to a wide range of to match your business needs.

What We Do

Auditing, accounting, taxation and management consulting are the cornerstones of our practice and we can offer a comprehensive, timely and cost effective range of services to all our clients. We develop close, long-term relationships with our clients and deliver services of the highest quality.

Our Values

The Gilroy Gannon philosophy:

  • Gaining a clear understanding of all of our clients needs.
  • Delivering a high quality service tailored to individual requirements.

Our commitment to these principles is the foundation of our business and continues to drive our growth.


I have been a client of Gilroy Gannon since I started in business in 1989. I have always found them to be extremely professional and helpful in their work and would have no hesitation in recommending them to anyone who needs top quality accounting service.

Frank McMorrow
Managing Director
Strandvaus Limited