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Research Associate Scientist - Bioassay

Eurofins

St. Louis, MO, United States permanent

Posted: May 19, 2026

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Quick Summary

A Research Associate Scientist in bioassay works in a fast-paced laboratory environment, collaborating with cross-functional teams to design, develop, and execute analytical testing protocols for pharmaceutical and cosmetic product testing, with a focus on ensuring the safety and quality of life's most essential products.

Job Description

Eurofins Scientific is an international life sciences company, providing a unique range of analytical testing services to clients across multiple industries, to make life and our environment safer, healthier and more sustainable. From the food you eat, to the water you drink, to the medicines you rely on, Eurofins laboratories work with the biggest companies in the world to ensure the products they supply are safe, their ingredients are authentic and labelling is accurate.

The Eurofins network of companies is the global leader in food, environment, pharmaceutical and cosmetic product testing and in agroscience Contract Research Organisation services. It is one of the market leaders in certain testing and laboratory services for genomics, discovery pharmacology, forensics, advanced material sciences and in the support of clinical studies, as well as having an emerging global presence in Contract Development and Manufacturing Organisations. It also has a rapidly developing presence in highly specialised and molecular clinical diagnostic testing and in-vitro diagnostic products.

In over 30 years, Eurofins has grown from one laboratory in Nantes, France to 58,000 staff across a decentralised and entrepreneurial network of 900 laboratories in over 54 countries. Eurofins companies offer a portfolio of over 200,000 analytical methods to evaluate the safety, identity, composition, authenticity, origin, traceability and purity of biological substances and products.

In 2021, Eurofins generated total revenues of EUR 6.72 billion, and has been among the best performing stocks in Europe over the past 20 years.

What you will learn and work with:

• Developing, performing, and troubleshooting in vitro cell-based expression assays and flow cytometry assays to support product testing.
• Supporting assay development through a variety of molecular biology techniques.
• Documenting and reporting laboratory data in accordance with GMP practices.
• Collaborating effectively within cross-functional and multi-disciplinary project teams to ensure timely and accurate testing.

Minimum Skills: 

Authorization to work in the United States indefinitely without restriction or sponsorship indefinitely. 

• Bachelors or Masters Degree in relevant life science field (Biotechnology, Biology, Biochemistry, Molecular Biology, or related discipline)

• 1-3 years of relevant industrial experience
• Hands-on experience with molecular and cell biology techniques, including familiarity with techniques such as:• In vitro expression assays
• Mammalian Cell Culture
• Cell-based assays
• Flow cytometry
• Aseptic technique

• Experience working in GMP and GMP-like environments is preferred.
• Strong attention to detail and adherence to good documentation practices.
• Candidates within a commutable distance of Chesterfield, MO are encouraged to apply

Desired Skills:

• PCR/qPCR, ELISA, Blotting Techniques
• Method validation experience.

• Position is full-time, Monday to Friday 8:00am - 5:00pm. Candidates currently living within a commutable distance of Chesterfield, MO are encouraged to apply.

What we offer:

· Comprehensive medical coverage, with dental and vision options

· Life and disability insurance

· Paid holidays and vacation.

Eurofins Lancaster Laboratories Professional Scientific Services® (PSS) is a global, award-winning insourcing solution that places our people at our clients’ site dedicated to running and managing laboratory services while eliminating headcount, co-employment and project-management worries.

Eurofins USA PSS Insourcing Solutions is a Disabled and Veteran Equal Employment Opportunity employer.

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