Mark Powell

Ontario Power Generation/Nuclear Security Officer First Line Manager Assistant

At a Glance
2025

Latest Salary

$158,141

2025

Total Compensation

$165,437

Incl. $7,296 benefits

Employer Rank

#5,172

Ontario Power Generation

Years on List

2008–2025

Salary History

Full History
2008–2025

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

#	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