About Mark Aitken

Mark Aitken appears on the Ontario Sunshine List with a 2025 disclosed salary of $336,831 plus $1,972 in taxable benefits (total $338,803). Mark is listed as Chief Administrative Officer at County Of Simcoe, in the Municipalities & Services sector.

Mark has appeared on the Ontario Public Sector Salary Disclosure every year from 2003 through 2025 — 23 consecutive years. Their reported salary has grown from $104,857 in 2003 to $336,831 in 2025 — a 221.2% change over 22 years.

Within the Municipalities & Services sector that year, Mark's $336,831 placed them in the 100th percentile (sector average: $133,194). 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 Mark has been disclosed under the Ontario Public Sector Salary Disclosure.