High quality bioanalitical services Since 1995
QPS Celebrated 30 Years in Business in 2025
Dr. Benjamin M. Chien founded Quest Pharmaceutical Services in 1995 to provide high quality bioanalytical LC-MS/MS contract services. Since then, the name has changed to QPS and the company has posted impressive growth every year and has grown from a small molecule bioanalysis shop of three people to over 1,200 employees in the United States, Europe, Asia, India and Australia.
Over the years, the company has adopted additional services, including:
Pharmacology
Validated Disease Models
Pharmacology
Together with our QPS DMPK and Toxicology, QPS Pharmacology builds custom-built research solutions for you.
Learn More
DMPK
ADME, QWBA and more
DMPK
Our scientists have deep expertise in drug metabolism and pharmacokinetics.
Learn More
Toxicology
Full-Service Toxicology Labs
Toxicology
QPS is committed to creating the highest quality toxicology data and reports.
Learn More
Bioanalysis
Small Molecule Assay Excellence
Bioanalysis
Explore our full range of bioanalytical services to support pharmaceutical development.
Learn More
Assay Finder
>800 Validated Assays
Assay Finder
Uncover our full range of Small Molecule, Large Molecule and Genomic Biomarker Assays.
Search Now
Translational Medicine
Large Molecule Assay Excellence
Translational Medicine
QPS excels at immunoassays for PK, biomarkers, immunogenicity assessments, NAb activity studies, and more.
Learn More
Clinical Development
Full-Service Phase I – IV
Clinical Development
As a global, full-service CRO, QPS is here to support your entire clinical development program.
Learn More
Regulatory Affairs
Global Asset Planning
Regulatory Affairs
Leading the way with excellence in external stakeholder management.
Learn More
Medical Affairs
Managing Clinical Trial Excellence
Medical Affairs
QPS offers custom-built Medical Affairs solutions to support efficient and effective product development.
Learn More
Pharmacovigilance
Expert Safety Reporting
Pharmacovigilance
The QPS team brings expert leadership, global reach and a world class database to safeguard patients.
Learn More
Timeline
QPS Corporate History
2020
2019
2012
2011
2010
2008
2005
2004
1999
1997
1996
1995
1994
1984