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
Dec 3, 2025

Good entry

Recommend
CEO approval
Business Outlook

Pros

simple training, nice management. Benefits are decent.

Cons

The pay is low with slow upward mobility.

4.0
Nov 10, 2025

Great Start

Recommend
CEO approval
Business Outlook

Pros

Good people Close to home

Cons

Some outdated software systems and manual processes

Viewing 13 - 15 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.