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In 1995, Dr. Benjamin M. Chien established Quest Pharmaceutical Services with the goal of offering premium contract services for bioanalytical LC-MS/MS. Since then, the firm has changed its name to QPS and has shown exceptional annual growth, going from a small molecule bioanalysis shop with three employees to over 1150 personnel across the US, Europe, India, and Asia. To be known as a preeminent international contract research company with a specialty in clinical trials and bioanalytics.


As a preclinical CRO, we possess the expertise and understanding needed to swiftly move a pharmaceutical product from the testing stage to clinical trials. We are leaders in the industry in the breadth and depth of our drug development solutions, and we look forward to talking with you about how we might meet your needs.