Illumina reviews

3.3

46% would recommend to a friend

(2,565 total reviews)
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Jacob Thaysen

53% approve of CEO

33% positive business outlook

Illumina has an employee rating of 3.3 out of 5 stars, based on 2,565 company reviews on Glassdoor which indicates that most employees have a good working experience there. The Illumina 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

3K reviews
3.0
Jan 21, 2026

Great people, toxic organization

Recommend
CEO approval
Business Outlook

Pros

Vast majority of coworkers are really dedicated and mission-driven, but that is about where the positive things end. Pay was decent at first, but 3% raises a year is all you can expect as they continue to promote directors and above.

Cons

Had north of 10 managers in 3 years, really catty, cut-throat culture. If you push back, they lay you off or fire you. Absolutely zero room for growth despite doing the jobs of your managers and directors. Best of luck to them!

5.0
Jan 21, 2026
Recommend
CEO approval
Business Outlook

Pros

Amazing industry doing good in the world, super smart and friendly people, what else can you ask for?

Cons

None, really. It’s a big company to it takes a bit to get to know process, etc but that’s to be expected.

Viewing 67 - 69 of 2,565 Reviews

Glassdoor has 2,976 Illumina reviews submitted anonymously by Illumina employees. Read employee reviews and ratings on Glassdoor to decide if Illumina is right for you.