About Nicola Mercer

Nicola Mercer appears on the Ontario Sunshine List with a 2025 disclosed salary of $356,341 plus $5,477 in taxable benefits (total $361,818). Nicola is listed as Medical Officer of Health and Chief Executive Officer at Wellington-Dufferin-Guelph Health Unit, in the Hospitals & Boards of Public Health sector.

Nicola has appeared on the Ontario Public Sector Salary Disclosure every year from 2008 through 2025 — 18 consecutive years. Their reported salary has grown from $193,154 in 2008 to $356,341 in 2025 — a 84.5% change over 17 years.

Within the Hospitals & Boards of Public Health sector that year, Nicola's $356,341 placed them in the 99th percentile (sector average: $126,617). Across the entire 2025 disclosure, this places them in the top 1% of all disclosed earners that year.

The interactive timeline and year-by-year breakdown below show every year Nicola has been disclosed under the Ontario Public Sector Salary Disclosure.