Calpine reviews

4.0

82% would recommend to a friend

(445 total reviews)

Andrew Novotny/Thad Hill

91% approve of CEO

75% positive business outlook

Calpine has an employee rating of 4.0 out of 5 stars, based on 445 company reviews on Glassdoor which indicates that most employees have a good working experience there. The Calpine 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

445 reviews
3.0
Apr 29, 2014

trader

Recommend
CEO approval
Business Outlook

Pros

great company to start with

Cons

no room for advancement and too stagnated

2.0
Aug 27, 2013

Not for the faint of heart

Recommend
CEO approval
Business Outlook

Pros

Well compensated, flexibility in work hours

Cons

Cut throat culture, management by fear, not willing to invest in employees or systems.

3.0
Apr 13, 2026
Recommend
CEO approval
Business Outlook

Pros

- Free breakfast - Hybrid - Depending on your role bonuses can be quite rewarding - Decent benefits (health, 401k matching, etc.)

Cons

- Severly limited growth prospects, no clear path to move up - Lousy base pay, annual bonuses being a significant portion of your salary work in a way to keep employees hostage - Many roles are temp-to-hire with very long (often 12+ months) periods before being hired full time - Workload can vary significantly depending on what team you're on, from being done with your work by 11am to having to work until 8pm - Some managers are not the best

Viewing 70 - 72 of 445 Reviews

Glassdoor has 523 Calpine reviews submitted anonymously by Calpine employees. Read employee reviews and ratings on Glassdoor to decide if Calpine is right for you.