Mark Powell

Ontario Power Generation/Nuclear Security Officer First Line Manager Assistant

2025 Salary

$158,141

Total compensation $165,437, including $7,296 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

Records separated by several years; may be more than one person.

At a Glance
2025

Employer Rank

#5,172

Ontario Power Generation

Years on List

2008–2025

Peak Salary

$161,724

2024

Full 2025 roster at Ontario Power Generation →·See where $158,141 ranks →

Total Compensation History

Total compensation, 2008–2025. Axis starts at $100,000, the Sunshine List disclosure threshold.

Full History
2008–2025

$106,086 in 2008 is worth about $152,668 in 2025 dollars.

Full salary history, by year
Year	Employer	Position	Salary	Benefits	Total
2025	Ontario Power Generation	Nuclear Security Officer First Line Manager AssistantOntario Power Generation	$158,141Benefits $7,296Total $165,437	$7,296	$165,437
2024	Ontario Power Generation	Nuclear Security Officer First Line Manager AssistantOntario Power Generation	$161,724Benefits $6,167Total $167,891	$6,167	$167,891
2023	Ontario Power Generation	Nuclear Security Officer First Line Manager AssistantOntario Power Generation	$160,403Benefits $6,024Total $166,427	$6,024	$166,427
2022	Ontario Power Generation	Nuclear Security Officer First Line Manager AssistantOntario Power Generation	$138,341Benefits $5,415Total $143,756	$5,415	$143,756
2021	Ontario Power Generation	Nuclear Security Officer First Line Manager AssistantOntario Power Generation	$146,006Benefits $4,877Total $150,883	$4,877	$150,883
2020	Ontario Power Generation	Nuclear Security Officer First Line Manager AssistantOntario Power Generation	$143,766Benefits $4,388Total $148,154	$4,388	$148,154
2019	Ontario Power Generation	Nuclear Security Officer First Line Manager AssistantOntario Power Generation	$134,406Benefits $3,817Total $138,222	$3,817	$138,222
2018	Ontario Power Generation	Nuclear Security Officer First Line Manager AssistantOntario Power Generation	$129,689Benefits $3,822Total $133,511	$3,822	$133,511
2017	Ontario Power Generation	Nuclear Security Officer First Line Manager AssistantOntario Power Generation	$123,729Benefits $4,225Total $127,954	$4,225	$127,954
2016	Ontario Power Generation	Nuclear Security Officer First Line Manager AssistantOntario Power Generation	$128,052Benefits $1,276Total $129,327	$1,276	$129,327
2015	Ontario Power Generation	Nuclear Security Officer First Line Manager AssistantOntario Power Generation	$111,883Benefits $1,270Total $113,153	$1,270	$113,153
2014	Ontario Power Generation	Nuclear Security Officer First Line Manager AssistantOntario Power Generation	$101,298Benefits $1,265Total $102,563	$1,265	$102,563
2010	Ontario Power Generation	Nuclear Security Officer, First Line Manager AssistantOntario Power Generation	$108,542Benefits $1,172Total $109,714	$1,172	$109,714
2009	Ontario Power Generation	Nuclear Security Officer, First Line Manager AssistantOntario Power Generation	$116,332Benefits $1,149Total $117,481	$1,149	$117,481
2008	Ontario Power Generation	Nuclear Security OfficerOntario Power Generation	$106,086Benefits $1,128Total $107,214	$1,128	$107,214

Take-Home Pay
(After Tax) · 2025 estimate

Take-home on Mark Powell's 2025 salary of $158,141 comes to roughly $108,365 once federal and Ontario income tax (about 28.0% effective) is deducted. Within Ontario Power Generation, Mark Powell's total compensation of $165,437 was the #5,172 of 10,346, against a median salary of $161,066. Records under this name have appeared on the Sunshine List 15 years in all, first in 2008. Members of OMERS, OTPP, HOOPP or OPTrust typically take home another 7–10% less after pension contributions, which this estimate leaves out.

Estimated net pay: ~$108,365
Effective income-tax rate (excl. CPP/EI): ~28.0%
CPP + EI contributions: ~$5,507
All-in deduction rate (incl. CPP/EI): ~31.5%
vs. 2025 Nuclear Security Officer First Line Manager Assistant median: about even

Where does $158,141 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.

Also at Ontario Power Generation
2025

Also at Ontario Power Generation, 2025
#	Name	Position	Salary	Total
1	Kenneth Hartwick	Special Advisor	$1,907,409	$1,910,992
2	Nicolle Butcher	President and Chief Executive Officer	$1,596,218	$1,598,309
3	Steve Gregoris	Chief Nuclear Officer	$1,092,855	$1,096,651
4	Aida Cipolla	Chief Financial Officer and Chief Administrative Officer	$1,013,496	$1,016,119
5	Subo Sinnathamby	Chief Projects Officer	$981,476	$985,253
6	Mark Knutson	Chief Enterprise Engineering and Chief Nuclear Engineer	$856,947	$859,793
7	Jon Franke	Senior Vice President Nuclear	$826,655	$828,637
8	Shelley Babin	Chief Operations Officer	$748,469	$750,849
9	Brenda Macdonald	Chief Commercial Officer	$727,479	$729,740
10	David Kaposi	Executive Vice President Investment Strategy and Business Development	$701,432	$703,541