Mark Williamson
Regional Municipality of York/Enterprise Architect
2025 Salary
$138,258Total compensation $138,674, including $416 in taxable benefits.
Source: Ontario’s Public Sector Salary Disclosure — names paid $100,000 or more that year. How we build this · Report an error on this page
At a Glance
2025
Employer Rank
#556Regional Municipality of York
Years on List
122014–2025
Peak Salary
$138,2582025
Full 2025 roster at Regional Municipality of York →·See where $138,258 ranks →
Total Compensation History
Full History
2014–2025
$109,063 in 2014 is worth about $143,036 in 2025 dollars.
| Year | Position | Salary |
|---|---|---|
| 2025 | Enterprise ArchitectRegional Municipality Of York | $138,258 |
| 2024 | Enterprise ArchitectRegional Municipality Of York | $130,699 |
| 2023 | Enterprise ArchitectRegional Municipality Of York | $125,740 |
| 2022 | Enterprise ArchitectRegional Municipality Of York | $124,004 |
| 2021 | Application AdministratorRegional Municipality Of York | $119,413 |
| 2020 | Application AdministratorRegional Municipality Of York | $111,663 |
| 2019 | Application AdministratorRegional Municipality Of York | $115,356 |
| 2018 | Application AdministratorRegional Municipality of York | $113,693 |
| 2017 | Application AdministratorRegional Municipality of York | $110,620 |
| 2016 | Application AdministratorRegional Municipality of York | $108,908 |
| 2015 | Application AdministratorRegional Municipality of York | $110,750 |
| 2014 | Application AdministratorRegional Municipality of York | $109,063 |
Take-Home Pay
(After Tax) · 2025 estimate
Of the $138,258 Mark Williamson earned in 2025, roughly $97,224 would remain after income tax, CPP and EI, an all-in deduction rate of about 29.7%. That is about 8% above the 2025 median of $128,444 for Enterprise Architect on the Sunshine List. Records under this name have appeared on the Sunshine List 12 years in all, first in 2014. Pension contributions — likely OMERS in the Municipalities & Services sector — would typically trim another 7–10% off that figure.
- Estimated net pay
- ~$97,224
- Effective income-tax rate (excl. CPP/EI)
- ~25.7%
- CPP + EI contributions
- ~$5,507
- All-in deduction rate (incl. CPP/EI)
- ~29.7%
- vs. 2025 Enterprise Architect median
- +8%
Where does $138,258 rank on the Sunshine List? →
Estimate only: 2025 federal and Ontario rates, basic personal amounts, Canada employment amount and CPP/EI credits; single, employment income only, salary treated as full-year income. Ignores pension contributions (OMERS, HOOPP, OTPP, OPTrust and similar plans lower actual take-home), union dues, RRSPs and benefits.