Hydro One and Ontario Power Generation
10,672 disclosed employees* earned $100K+ in 2025, across 5 employers in this sector. Total disclosed salary* grew +5.5% year over year. The most common roles here are Nuclear Operator, Electrical and Control Technician, Senior Technical Engineer, Mechanical Technician and Civil Maintainer.
Hydro One and Ontario Power Generation total disclosed salary & employees 2010–2025
Total disclosed salary
Disclosed employees
Fastest movers 50+ on the role
Operating Technician
65 people
+13.5%
Hydroelectric Operating Technician
71 people
+11.1%
Project Manager
130 people
+10.3%
Senior Manager
158 people
+9.1%
Procurement Specialist
82 people
+7.5%
Same person, same role, consecutive years — not a raw average.
Most common positions 2025 disclosed employees
Top disclosed earners leaderboard →
Kenneth Hartwick — Special Advisor
Ontario Power Generation
$1,910,992
Nicolle Butcher — President and Chief Executive Officer
Ontario Power Generation
$1,598,309
Steve Gregoris — Chief Nuclear Officer
Ontario Power Generation
$1,096,651
Aida Cipolla — Chief Financial Officer and Chief Administrative Officer
Ontario Power Generation
$1,016,119
Subo Sinnathamby — Chief Projects Officer
Ontario Power Generation
$985,253
Highest paid in Hydro One and Ontario Power Generation highest-median-salary normalized positions, 2025
$394,261
26 in this role · median $316,013
$329,509
27 in this role · median $239,858
$435,416
5 in this role · median $226,078
$561,418
85 in this role · median $220,708
Top 15 roles in Hydro One and Ontario Power Generation disclosed employees, median salary, matched raise
| Role | Disclosed Emp. | Median | Raise |
|---|---|---|---|
| Nuclear Operator | 781 | $170,673 | +5.5% |
| Electrical and Control Technician | 576 | $167,889 | +2.8% |
| Senior Technical Engineer | 464 | $155,130 | +3.6% |
| Mechanical Technician | 406 | $160,695 | +2.5% |
| Civil Maintainer | 300 | $130,724 | +0.1% |
| Foreman | 276 | $148,420 | -11.6% |
| Mechanic | 270 | $180,004 | +2.6% |
| Control Technician | 260 | $150,390 | +4.8% |
| Nuclear Security Officer | 260 | $140,658 | +2.8% |
| Mechanical Technician and Technologist | 253 | $152,442 | +5.1% |
| Project Leader | 229 | $151,211 | +5.2% |
| Supervising Nuclear Operator First Line Manager Assistant | 199 | $190,560 | +1.0% |
| Assistant Technical Engineer | 197 | $116,689 | +7.2% |
| Senior Manager | 158 | $206,736 | +9.1% |
| Senior Engineer | 150 | $152,268 | -1.1% |