Does IESO pay their employees well?

According to anonymously submitted Glassdoor reviews, IESO employees rate their compensation and benefits as 4.5 out of 5. Find out more about salaries and benefits at IESO. This rating has been stable over the past 12 months.

How satisfied are employees working at IESO?

84% of IESO employees would recommend working there to a friend based on Glassdoor reviews . Employees also rated IESO 4.3 out of 5 for work life balance, 4.1 for culture and values and 4.0 for career opportunities.

What are the top reviewed jobs at IESO?

Analyst (17) , Intern (15) , Supervisor (8) , Advisor (5) , Business Analyst (4) , Developmental Student (4) , Engineer (4) , Co-Op Student (3) , Coop Student (3) , Engineering Co-Op (3) , Junior Market Analyst (3) , Power Systems Analyst (3) , Communications Advisor (2) , Development Student (2) , Junior Analyst (2)

What are the pros of working at IESO according to real employee reviews?

"People are nice and easy to work work" ((in 27 reviews)); "gives good work life balance" ((in 24 reviews)); "Flexibility and good pay" ((in 19 reviews)); "Good Benefits and worklife balance" ((in 18 reviews)); "Salary is good" ((in 14 reviews))

What are the cons of working at IESO according to real employee reviews?

"Management has no vision, promotions are a popularity contest, low management mostly incompetent at managing" ((in 6 reviews))

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IESO

IESO Reviews

4.2

84% would recommend to a friend

(125 total reviews)

Lesley Gallinger

99% approve of CEO

67% positive business outlook

Ratings by category

4.5

Compensation and benefits

4.3

Work/Life balance

4.1

Culture and values

4.0

Diversity and inclusion

4.0

Career opportunities

3.8

Senior management

IESO has an employee rating of 4.2 out of 5 stars, based on 125 company reviews on Glassdoor which indicates that most employees have an excellent working experience there. The IESO employee rating is in line with the average (within 1 standard deviation) for employers within the Energy, mining, utilities industry (3.7 stars).

Reviews by job title

125 reviews

5.0

6 Mar 2026

Work

Sytem analyst

Recommend

CEO approval

Business outlook

Pros

Great Company to work with

Cons

work from home will not an option soon

4.0

11 Jan 2026

Good Place

Anonymous employee

Recommend

CEO approval

Business outlook

Pros

Unionize, attractive salary, work-life balance, DBP

Cons

Limited promotion opportunities and a lack of basic knowledge among some employees.

4.0

8 Dec 2025

Good Employer

Advisor

Recommend

CEO approval

Business outlook

Pros

Unique work; great work-life balance

Cons

Bureaucratic; employees not particularly driven; promotions and assignments to roles are often arbitrary and not merit-based

Viewing 1 - 3 of 125 Reviews

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Jobs at IESO

Windows Server Infrastructure Specialist

Mississauga

CA$111K - CA$159K /yr

CA$111K - CA$159K /yr

(Employer provided)

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Specialist Information Security (Governance)

Mississauga

CA$111K - CA$159K /yr

(Employer provided)

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Analyst Program Performance

Specialist Systems Analysis

Oakville

CA$111K - CA$159K /yr

(Employer provided)

View job

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