Smith and Williamson is an accountancy firm that provides a wide range of services such as audit, assurance, accounting, advisory, mergers and acquisitions, taxation, and business consultancy to the Irish and International Business Communities. S&W caters to industries including aerospace and defense, bloodstock, charities and education, financial services, real estate, landed estate, and technology. The firm was founded in 1881 and is headquartered in Dublin, Ireland.