Quest Diagnostics is among DEI 2018 Best Places to Work for Disability Inclusion Quest Diagnostics is ranked among Forbes 2018 Americas Best Employers for the second consecutive year Named to Fortune Magazines 2018 Worlds Most Admired Companies list in the Health Care industry category of Pharmacy and Other Services for the third consecutive. All third-party marks and are the property of their respective owners. Quest Diagnostics S Competitors Revenue Number Of Employees Funding Acquisitions News Owler Company Profile Products and services for employers commercial labs clinical trials research organizations health plans life insurance companies clinics and government agencies. Quest diagnostics similar companies . Who are Quest Diagnosticss main competitors. Quest Diagnostics headquarters is located at 500 Plaza Dr Secaucus. Quest Diagnostics empowers people to take action to improve health outcomes. 2000-2021 Quest Diagnostics. What are perks and other benefits like at Qu