Carol Layton was appointed Deputy Minister of the Ministry of Revenue on July 21, 2008.

Carol was formerly the Deputy Minister of the former Ministry of Public Infrastructure Renewal (PIR) – a role she assumed on October 24, 2005. Prior to joining PIR, Carol took on a short-term assignment in the Ministry of Finance to lead the initial establishment of Treasury Board Office.

Carol's first appointment as Deputy Minister was with the Ministry of Citizenship in 2003. Along with this appointment, she was the Deputy Minister Responsible for Seniors and for Women's Issues. She later established the Results Office in Cabinet Office. This Office provided corporate oversight for the Ontario government in delivering on its key priorities and results, and in public reporting on progress.

She also has held senior management positions in Management Board Secretariat and the ministries of Health and Long-Term Care, Finance, and the Attorney General.

Carol is a member of the Board of Directors of the Ontario Financing Authority (OFA) and its Audit and H.R. Committees. She serves as a volunteer with the Out-of-the-Cold Program in the west end of Toronto.

She is a past president of The Institute of Public Administration of Canada (IPAC) (2006-2007) and remains a member of its International and Endowment Fund Committees as well as the Vanier Medal Nomination Committee. Carol holds an Honours Environmental Studies degree from the University of Waterloo and attended the Queen's University Public Executives Program.