Middlesex – London Health Unit had 40 employees on the 2025 Ontario Sunshine List, with an average salary of $133,701 and a total disclosed payroll of $5M — up 11.1% from 2024. The highest-paid employee on record was Christopher Mackie (Medical Officer of Health, 2020), earning $416,973.
Highest paid all-time
Medical Officer of Health
$416,973
2020
Associate Medical Officer of Health
$339,850
2020
Medical Officer of Health
$330,648
2025
Medical Officer of Health
$309,854
2024
Associate Medical Officer of Health
$265,881
2025
Associate Medical Officer of Health
$263,462
2024
Chief Executive Officer
$233,471
2025
Chief Executive Officer
$225,948
2024
Chief Executive Officer
$208,053
2020
Director
$181,316
2020
| Name | Role | Year | Total Comp. |
|---|---|---|---|
| Christopher Mackie | Medical Officer of Health | 2020 | $416,973 |
| Alexander Summers | Associate Medical Officer of Health | 2020 | $339,850 |
| Alexander Summers | Medical Officer of Health | 2025 | $330,648 |
| Alexander Summers | Medical Officer of Health | 2024 | $309,854 |
| Joanne Kearon | Associate Medical Officer of Health | 2025 | $265,881 |
| Joanne Kearon | Associate Medical Officer of Health | 2024 | $263,462 |
| Emily J Williams | Chief Executive Officer | 2025 | $233,471 |
| Emily J Williams | Chief Executive Officer | 2024 | $225,948 |
| Michael Clarke | Chief Executive Officer | 2020 | $208,053 |
| Maureen Maccormick | Director | 2020 | $181,316 |
Disclosed employees · bars = headcount, lines = salary
Employees
40
Avg Salary
$133,701
Median
$124,169
Total Payroll
$5.3M
Employees
36
Avg Salary
$132,823
Median
$121,270
Total Payroll
$4.8M
Employees
63
Avg Salary
$125,919
Median
$112,467
Total Payroll
$7.9M
| Year | Employees | Avg Salary | Median Salary | Total Payroll | Headcount Δ |
|---|---|---|---|---|---|
| 2025 | 40 | $133,701 | $124,169 | $5.3M | +11.1% |
| 2024 | 36 | $132,823 | $121,270 | $4.8M | -42.9% |
| 2020 | 63 | $125,919 | $112,467 | $7.9M | — |
Data sourced from the Ontario Public Sector Salary Disclosure. This site is independent and not affiliated with the Government of Ontario. Always verify against the official source.