Graham O'Sullivan

Graham O'Sullivan is a seasoned technology executive with extensive experience in leadership roles across various companies. Currently serving as Chief Product Officer at HappyStack since February 2025, Graham previously held key positions including Chief Technology Officer and VP of Engineering at Fresco, and Delivery Head for the Fashion AI Platform at Zalando SE. Graham's background also includes significant contributions as AVP of Architecture and Software at Unum, where responsibilities encompassed enterprise architecture development and Agile transformations, as well as positions at Information Mosaic as Director of Architecture. Graham began a career in technology with roles ranging from Senior Software Engineer at Trintech Technologies to Software Engineer at New Ireland. Educational qualifications include a postgraduate diploma in Computer Software Engineering from Griffith College Dublin and a BA in English, History, and Philosophy from University College Dublin.