Mark Demczak

$253,391.17asAuthorization Training Supervisor+11.05%

Employed by Ontario Power Generation in 2025, according to Government of Ontario public salary records.

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Position

Authorization Training Supervisor

Employer

Ontario Power Generation

Salary Information

Historical salary and taxable benefits from 2012 to 2025.

Year	Position	Salary	Benefits	Performance
2025	Authorization Training Supervisor	$253,391.17	$8,348.47	11.05%
2024	Authorized Nuclear Operator	$228,168.60	$7,144.10	8.26%
2023	Authorized Nuclear Operator	$248,705.14	$6,781.23	23.29%
2022	Authorized Nuclear Operator	$201,731.56	$6,083.31	14.52%
2021	Authorized Nuclear Operator in Training - Nuclear Operator	$176,154.06	$5,464.90	4.12%
2020	Authorized Nuclear Operator in Training - Nuclear Operator	$169,184.09	$4,925.40	7.65%
2019	Authorized Nuclear Operator in Training - Nuclear Operator	$157,164.97	$4,301.30	1.03%
2018	Authorized Nuclear Operator in Training - Nuclear Operator	$155,560.97	$4,295.13	4.28%
2017	Authorized Nuclear Operator in Training - Nuclear Operator	$149,179.77	$4,568.35	1.38%
2016	Nuclear Operator	$147,152.99	$1,367.04	3.05%
2015	Nuclear Operator	$142,792.54	$1,322.64	5.65%
2014	Nuclear Operator	$135,156.40	$1,283.28	1.68%
2013	Nuclear Operator	$137,461.10	$1,238.40	30.22%
2012	Nuclear Operator	$105,558.29	$1,194.96	—

Mark Demczak, Authorization Training Supervisor at Ontario Power Generation, earned a disclosed salary of $253,391.17 in 2025 on the Ontario Sunshine List. This represents a 11.05% increase over the previous year's reported salary. Mark Demczak has appeared on the Ontario Sunshine List 14 times between 2012 and 2025, with reported earnings peaking at $253,391.17 in 2025. In addition to salary, $8,348.47 in taxable benefits was disclosed for 2025. Ontario Power Generation reports under the Ontario Power Generation sector of Ontario's public sector salary disclosure.

Top earning Authorization Training Supervisors in Ontario Power Generation

Name	Salary
Jeff Creary	$345,174.04
Krista Huszarik	$330,746.76
Thomas St. Denis	$325,585.83
Brendon Ramdoo	$323,112.22
Joseph Cherkas	$322,982.94
Kurt Poppe	$317,691.17
Stephen Rypstra	$310,127.51
Roger Schryer	$309,535.59
Brian Peck	$307,369.87
Martin Dobrescu	$305,823.31

Other employees at Ontario Power Generation

Name	Position	Salary
Brian Syer Supervising Nuclear Operator First Line Manager Assistant	Supervising Nuclear Operator First Line Manager Assistant	$253,579.58
Norma Siroski Director Controllership	Director Controllership	$253,567.70
Jesse Tranter Mechanical Technician	Mechanical Technician	$253,524.28
Margaret Mervin Project Director	Project Director	$253,511.04
Michael Murphy Thermal Operating Supervisor	Thermal Operating Supervisor	$253,503.43
George Mayer Certified Unit O Control Room Operator	Certified Unit O Control Room Operator	$253,305.55
Edmund Tam Director Model Development and Analytics	Director Model Development and Analytics	$253,247.16
Michael Martelli Chief Projects Officer	Chief Projects Officer	$253,139.00
Tony Jesswein First Line Manager, Chemical Laboratory	First Line Manager, Chemical Laboratory	$253,090.05
Aubrey Au Director Programs and Strategy	Director Programs and Strategy	$253,026.21