Expertise: Small Business Accounting, Tax Strategy, and Operational Efficiency
Eamon O’Sullivan is the founder and Director of OSA McQuillan, a firm dedicated to the financial health of over 250 small businesses. His career is built on a foundation of academic excellence and three decades of hands-on practice.
Experience & Expertise: Eamon graduated from UCG (now NUI Galway) with a Bachelor of Commerce and achieved his professional accounting qualification in 1993.
Business Evolution: In 1995, he established O’Sullivan Associates, which he successfully rebranded and expanded into OSA McQuillan in 2017. This 30-year track record makes him a trusted authority in Dublin’s accounting landscape.
The Mission: Eamon believes that business owners should spend their time growing their companies, not buried in spreadsheets. He specializes in identifying efficiencies that reduce the time you spend on accounting.
Personal & Community Connection A proud Limerick native, Eamon is a passionate rugby enthusiast. On the weekends, he stays active in the local community by participating in ParkRun, where he is currently focused on improving his 5K personal best.
Ready to simplify your business?
Phone: 01 283 4123
Consultation: 15-Minute Discovery Call
Location: Dublin, Ireland
Are you spending more time on your books than on your business?
Accounting shouldn’t be a hurdle to your lifestyle. Eamon O’Sullivan (Director of OSA McQuillan) has spent 30 years helping business owners solve this exact problem. Having qualified in 1993 and built his own practice from the ground up since 1995, Eamon understands the unique pressures of the Irish SME sector.
His goal is simple: to handle your numbers so you can do something more enjoyable—whether that’s growing your revenue or, like Eamon, hitting a new PB at a weekend ParkRun.
