Mr. Halliday is the area managing partner for Ernst & Young Japan (EY). He has been with EY for more than thirty years and has led audits for large multinational and entrepreneurial businesses across a broad range of sectors. He is a member of the Global Executive and has served as regional managing partner for two of the largest EY Regions globally: the UK and Ireland and the northeast region of the US.

Mr. Halliday has also been seconded to Kuwait, Australia, and the UK, adding to his extensive overseas experience.