Clark has worked in accounting standard-setting roles in Australia, the USA and the UK since 1987. His current principal responsibilities at the AASB cover many of the Accounting Standards-related projects, particularly public sector projects, and related regulatory matters. Clark has been involved with many areas over the years, including implementation issues and four years as Technical Advisor to the Australian member of the International Public Sector Accounting Standards Board. Clark currently holds the Technical Advisor role again.
Prior to becoming a standard setter, Clark worked for a predecessor firm of Ernst & Young, in auditing, technical and education roles, based in Melbourne, but also with experience in Singapore and Indonesia.