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Leading, Growing Company

We are the leading provider of diagnostic testing services with a medical and scientific staff of approximately 900 MDs and PhDs, an extensive network of patient locations and a broad range of complimentary diagnostic products. Our creative employees working together in technology-rich settings and stimulating environments are what make Quest Diagnostics an industry leader.

The numbers tell an important part of the story:

Employees: Approximately 43,000, including almost 900 MDs and PhDs
Patient service centers: 2,000 in communities across the U.S.
Laboratories in our network: 30-plus regional labs, 125 rapid-response labs
U.S. hospitals and physicians served: 50%
Times we touch the lives of patients: More than 150 million times each year
Medical worker

But we’re about far more than just numbers.Quest Diagnostics is about people— the millions of patients who count on us, and the employees who make our services possible.

For example, through our science and innovation team and with external partners, we’ve developed breakthrough laboratory tests, many of which are now the standard of care. We are a leading provider of cancer diagnostics and gene-based testing, and are one of the largest providers of global central laboratory services for clinical research trials on new drugs.

Thanks to innovations like these and many others, Fortune included us on its list of the “World’s Most Admired Companies” for three consecutive years.

Benefit from the wealth of resources and opportunities that come with working for a leader. Learn about our career opportunities.