C40 Reviews

3.7

65% would recommend to a friend

(62 total reviews)
avatar

Mark Watts

65% approve of CEO

52% positive business outlook

C40 has an employee rating of 3.7 out of 5 stars, based on 62 company reviews on Glassdoor which indicates that most employees have a good working experience there. The C40 employee rating is in line with the average (within 1 standard deviation) for employers within the Non-profit and NGO industry (3.7 stars).

Reviews by job title

62 reviews
5.0
8 Jan 2026
Recommend
CEO approval
Business outlook

Pros

Extremely competent and wonderful colleagues

Cons

Lots of fixed-term contracts - long-term job security is a common concern. Global nature of organisation can impact your working hours/work-life balance.

5.0
12 May 2025

Great experience

Anonymous employee
Recommend
CEO approval
Business outlook

Pros

Meaningful work Good benefits Great international team

Cons

None that I can think of so far

Viewing 1 - 3 of 62 Reviews

Glassdoor has 81 C40 reviews submitted anonymously by C40 employees. Read employee reviews and ratings on Glassdoor to decide if C40 is right for you.