Senior Quality Control Lab Analyst
Avantor
Listing collected from Avantor's career site. NextChapter is independent of Avantor.
Saint Louis, MO · Posted October 22, 2026
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Where Saint Louis, MO ranks
Where Saint Louis, MO placed in our monthly rankings, month by month. Each month stays online at its own address.
November 2026
- #9Best all-round cities for new graduates in the Midwest52 / 100 · of 20
- #9Cities hosting the most business conferences in the Midwest8 conferences · of 12
- #9Cities hosting the most legal services conferences4 conferences · of 17
- #11Best cities for government pay after cost of living$123k · of 18
- #11Best cities for entry-level jobs that want AI skills in the Midwest4% · of 52
- #12Best all-round cities for remote workers in the Midwest42 / 100 · of 20
How AI is used in this kind of work
AI use among life, physical, and social science technicians, all other is little observed so far. Measured exposure for life, physical, and social science technicians, all other: 10% (little observed).
Share of this job’s tasks that AI is already used for at work, from real usage. It is not a forecast of job loss, and a low number means no use seen yet. Source: Anthropic Economic Index.
Avantor has filed one layoff notice in the last twelve months, covering 54 workers, most recently February 2026. These are public filings with state labor departments, and an open role can sit alongside them. See the filings
About the job
The Opportunity:
Avantor is looking for a Senior Quality Control Lab Analyst to join our team!
This is a full-time, onsite position based in St. Louis, Missouri , working Monday through Friday.
What we’re looking for
Education: Bachelor’s degree in Biology, Chemistry, Biochemistry, or other science related field
Experience: Minimum 3 years of microbiology laboratory experience, including testing in accordance with current USP and EP requirements; 5+ years of relevant microbiology experience strongly preferred
Collaboration Tool: Experience using Microsoft Suite applications (Outlook, Teams, etc.)
Preferred Qualifications: Experience with Biolog, BMU, and MALDI-TOF systems
Experience performing endotoxin testing, including gel clot and kinetic methods
Knowledge of USP/EP microbiological compendial testing and associated regulatory requirements
Experience in a GMP-regulated microbiology laboratory environment
How you will thrive and create an impact
Conduct routine testing for microbial contamination. Including but not limited to, total plate count, yeast and mold count, specified pathogen testing, and endotoxin testing.
Prepare and process raw material, in-process samples, and finished products for microbiological testing.
Analyze test results, prepare reports and document findings in laboratory notebooks or electronic systems.
Maintain accurate records and ensure proper documentation of all laboratory activities, test results and events.
Conduct validation and qualification of microbiological test methods, consumables and laboratory equipment.
Operate and maintain laboratory equipment such as autoclaves, incubators, laminar flow hoods, and microbial identification systems. Ensure equipment calibration is performed per established schedules.
Conduct routine environmental monitoring of laboratory and production areas, including water and viable air monitoring.
Maintain laboratory inventory and order consumables as needed.
Lead investigations and report findings to Quality Control management.
Assist with training and mentoring of new and/or junior team members on laboratory processes and techniques.
Perform other duties as assigned.
#LI-Onsite
Disclaimer: The above statements are intended to describe the general nature and level of work being performed by employees assigned to this classification. They are not intended to be construed as an exhaustive list of all responsibilities, duties and skills required of employees assigned to this position. Avantor is proud to be an equal opportunity employer.
Why Avantor?
Dare to go further in your career. Join our global team of 14,000+ associates whose passion for discovery and determination to overcome challenges relentlessly advances life-changing science.
The work we do changes people's lives for the better. It brings new patient treatments and therapies to market, giving a cancer survivor the chance to walk his daughter down the aisle. It enables medical devices that help a little boy hear his mom's voice for the first time. Outcomes such as these create unlimited opportunities for you to contribute your talents, learn new skills and grow your career at Avantor.
We are committed to helping you on this journey through our diverse, equitable and inclusive culture which includes learning experiences to support your career growth and success. At Avantor, dare to go further and see how the impact of your contributions set science in motion to create a better world. Apply today!
EEO Statement:
We are an Equal Employment/Affirmative Action employer and VEVRAA Federal Contractor. We do not discriminate in hiring on the basis of sex, gender identity, sexual orientation, race, color, religious creed, national origin, physical or mental disability, protected Veteran status, or any other characteristic protected by federal, state/province, or local law.
If you need a reasonable accommodation for any part of the employment process, please contact us by email at recruiting@avantorsciences.com and let us know the nature of your request and your contact information. Requests for accommodation will be considered on a case-by-case basis. Please note that only inquiries concerning a request for reasonable accommodation will be responded to from this email address.
For more information about equal employment opportunity protections, please view the Know Your Rights poster .
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3rd Party Non-Solicitation Policy:
By submitting candidates without having been formally assigned on and contracted for a specific job requisition by Avantor, or by failing to comply with the Avantor recruitment process, you forfeit any fee on the submitted candidates, regardless of your usual terms and conditions. Avantor works with a preferred supplier list and will take the initiative to engage with recruitment agencies based on its needs and will not be accepting any form of solicitation.