Charles-Antoine is the Chair of the Public Sector Accounting Board of Canada, since July 1, 2017 for a 5-year mandate.  He joined the Board after retiring as the EY national managing partner for public sector.

During his career, Charles-Antoine served as Comptroller General of Canada for three years and also as vice-president at Cap Gemini, a global technology company.

He has practiced extensively in Canada and abroad during his career, with all levels of governments and has served on not-for-profit organizations boards and also lectured at both the undergraduate and graduate levels.