Quest Diagnostics reviews

3.2

52% would recommend to a friend

(5,664 total reviews)

Jim Davis

58% approve of CEO

49% positive business outlook

Quest Diagnostics has an employee rating of 3.2 out of 5 stars, based on 5,664 company reviews on Glassdoor which indicates that most employees have a good working experience there. The Quest Diagnostics employee rating is in line with the average (within 1 standard deviation) for employers within the Salud industry (3.4 stars).

Reviews by job title

6K reviews
1.0
Apr 21, 2026
Recommend
CEO approval
Business Outlook

Pros

Good job stability and 8-5 job Might be okay for an entry level role

Cons

The work culture is deeply reactive rather than proactive. Because leadership lacks a fundamental understanding of the technical operations, they rely on "micromanagement by crisis." When a regulatory audit looms or a process failure occurs, the floor becomes a high-stress environment filled with blame shifting rather than root cause analysis. If you are a subject matter expert, your input will likely be dismissed or viewed as a threat to managers who are out of their depth. Opportunities for internal promotion are nonexistent because there is no structured mentorship or professional development path. You’ll find yourself stagnant, performing repetitive tasks while watching the quality of output dwindle. The is a huge ethical concern regarding patient safety and compliance due to procedures not being followed and lack of oversight.

Viewing 16 - 18 of 5,664 Reviews

Glassdoor has 6,055 Quest Diagnostics reviews submitted anonymously by Quest Diagnostics employees. Read employee reviews and ratings on Glassdoor to decide if Quest Diagnostics is right for you.