Michael Costello

Partner & Head of Sustainability, BDO Dublin



Michael is part of the Senior Leadership team at BDO Ireland, which is responsible for the development and execution of the Firm's vision, goals, and strategy. Michael previously held the role of Managing Partner between 2014 to 2023, where he grew the Firm to meet the changing needs of our people, clients, and community. Prior to his appointment as Managing Partner, Michael was Head of Audit in BDO.


Michael has Commerce and Masters degrees in Banking & Finace from UCD, he trained and qualified as a Chartered Accountant with Price Waterhouse before joining BDO in 2004. 

His clients have included the Firm's largest indigenous and international companies across the information technology, financial services, pharmaceutical and property sectors. In addition, he has served as an auditor and trusted adviser to a wide range of large private and public companies for more than 20 years.

Michael is a Fellow of Chartered Accountants Ireland, a Board Director of Development Capital DAC. 

Michael also holds a Certificate in Sustainability Strategy, Risk and Reporting from Chartered Accountants Ireland.