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Charles River Laboratories

Engaged Employer

Charles River Laboratories reviews

3.1

48% would recommend to a friend

(2,366 total reviews)
avatar

Birgit Girshick

69% approve of CEO

31% positive business outlook

Charles River Laboratories has an employee rating of 3.1 out of 5 stars, based on 2,366 company reviews on Glassdoor which indicates that most employees have a good working experience there. The Charles River Laboratories employee rating is in line with the average (within 1 standard deviation) for employers within the Pharmaceutical & Biotechnology industry (3.5 stars).

Reviews by job title

2K reviews
3.0
Apr 7, 2026
Recommend
CEO approval
Business Outlook

Pros

Optional 4 10-hour days were nice. Onsight cafeteria with fresh cooked food. Independent working for the majority of the day; allowed to listen to music while completing tasks.

Cons

Days can feel very long. Unrealistic workloads for one person; for example some techs were given over 200 hours of tasks in a 40-hour work week. Most tasks cannot go undone for at most 3 days. Tasks were delegated although if you were fast and efficient they will continue to add things to your task list throughout the week.

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Charles River Laboratories Response
2w
We’re continuously working to support a healthier work-life balance for our employees. We understand that demands can vary by role and site, and we’re exploring ways to offer more flexibility and improve overall workload management.
4.0
Apr 6, 2026
Recommend
CEO approval
Business Outlook

Pros

Good salaries, you can earn a lot if you take overtime.

Cons

there are a lot overtimes, sometimes need to take night shift.

5.0
Apr 1, 2026
Recommend
CEO approval
Business Outlook

Pros

great place to work !

Cons

no cons at crl !

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Charles River Laboratories Response
2w
Thank you for your positive feedback. We’re glad to hear you’re having a great experience and appreciate your contributions to our culture.
Viewing 22 - 24 of 2,366 Reviews

Glassdoor has 2,657 Charles River Laboratories reviews submitted anonymously by Charles River Laboratories employees. Read employee reviews and ratings on Glassdoor to decide if Charles River Laboratories is right for you.