Illumina reviews

3.3

46% would recommend to a friend

(2,565 total reviews)
avatar

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
5.0
Jan 13, 2026

Great Culture and Flexibility

Anonymous employee
Recommend
CEO approval
Business Outlook

Pros

Culture is great and great flexibility

Cons

Morale is down due to frequent RIF

3.0
Jan 12, 2026
Recommend
CEO approval
Business Outlook

Pros

Nice benifits, flexible account, medical

Cons

Continuous restructuring, unclear roadmap, change of company value

3.0
Jan 3, 2026

Harsh culture

Anonymous employee
Recommend
CEO approval
Business Outlook

Pros

Smart people, interesting and challenging projects

Cons

Senior Leadership, constant change of direction, lots of layoffs create poor morale

Viewing 70 - 72 of 2,565 Reviews

Glassdoor has 2,977 Illumina reviews submitted anonymously by Illumina employees. Read employee reviews and ratings on Glassdoor to decide if Illumina is right for you.