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71 research scientist jobs at 25 companies in Saint Charles, MO

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Research Scientist or Senior Research Associate - Taylor Lab
Olivette, Missouri, United States
OnsiteFull Time
Donald Danforth Plant Science Center
Donald Danforth Plant Science Center: Independent nonprofit research institute advancing plant science for food security, human health, environmental sustainability, and economic development.
5+ YOE5+ Mgmt5+ years experience leading plant transformation platforms and supervising technical staff; expertise in cassava transformation, Agrobacterium biology, vector design, tissue culture, molecular analysis, and scientific communication. PhD with postdoc or MSc with extensive research experience required.
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Senior AI Research Scientist – Foundation Models & Agentic AI
Charlotte or San Francisco or West Des Moines or Irving or Tempe or Saint Louis or Minneapolis
$139k-$260k/yr HybridFull Time
Wells Fargo
Wells FargoNYSE: WFC: Multinational financial services providing banking and investment products.
4+ YOERequires 4+ years of quantitative analytics experience and a master's degree in a quantitative discipline. Desired: PhD or applied research experience, AI/ML publications, and expertise in foundation models, LLMs, agentic AI, and production systems.
GPT-4, BERT, LLaMA, Claude, GitHub Copilot, GPU, Transformer, TensorFlow, PyTorch, Hugging Face, AWS, GCP
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Senior Scientist - Bursky Public Health
St. Louis, Missouri, United States
$63k-$115k/yr OnsiteFull Time
Bursky School of Public Health
Bursky School of Public Health: Private research university providing higher education and healthcare services.
3+ YOEDoctoral degree in public health/epidemiology/social sciences, postdoctoral or 2–3+ years research experience, expertise in quantitative methods, proficiency with R/Stata/Python, grant writing and project management.
R, Stata, Python
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Senior Analytical Scientist
St. Louis, Missouri, United States
$76k-$114k/yr OnsiteFull Time
MilliporeSigma
MilliporeSigma: Merck KGaA's U.S./Canada life science business supplies research tools, bioprocessing products, and services to scientists and drugmakers.
1+ YOEBachelor/Master/PhD in chemistry or related field with industrial research experience, analytical method development and transfer experience, protein characterization techniques, instrumentation troubleshooting, and strong communication skills.
ELISA, SPR, Isoelectric Focusing, CE, UV-Vis, HPLC, GC, IC, UPLC, SEC, HILIC, Microsoft Word, Microsoft Excel, PowerPoint
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Senior Analytical Scientist
St. Louis, Missouri, United States
$76k-$114k/yr OnsiteFull Time
MilliporeSigma
MilliporeSigma: Merck KGaA's U.S./Canada life science business supplies research tools, bioprocessing products, and services to scientists and drugmakers.
1+ YOEBachelor's plus 6+ years, master's plus 2+ years, or PhD plus 1+ year of research in a relevant life science or engineering discipline; analytical development and GMP experience required.
ELISA, SPR, Isoelectric Focusing, CE, UV-Vis, HPLC, GC, IC, UPLC, SEC, HILIC, Microsoft Word, Microsoft Excel, Microsoft PowerPoint
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Scientist II
St. Louis, Missouri, United States
OnsiteFull Time
Kindeva Drug Delivery
Kindeva Drug Delivery: Private global drug-delivery CDMO developing and manufacturing injectable, inhaled, nasal, transdermal, and intradermal products for pharmaceutical companies.
2+ YOEDegree in chemistry/biochemistry (BS/MS/PhD) with 2+ years industry experience (PhD 2+/MS 3+/BS 5+), GMP analytical method development/validation experience, chromatography and biochemical technique proficiency, Empower/Chromeleon familiarity.
HPLC, UPLC, LC-MS, GC-MS, FTIR, SDS-PAGE, ELISA, Western Blot, Karl Fischer titration, Empower, Chromeleon
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3w
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Senior Scientist
St. Louis, Missouri, United States
$106k-$158k/yr OnsiteFull Time
MilliporeSigma
MilliporeSigma: Merck KGaA's U.S./Canada life science business supplies research tools, bioprocessing products, and services to scientists and drugmakers.
5+ YOERequires chemistry-related BS with 5–7+ years, master's with 3–5+ years, or PhD with 0–1+ years; advanced LC-MS experience, biomolecule sample preparation, and independent and team communication skills.
LC-MS, Multiple Reaction Monitoring (MRM), Parallel Reaction Monitoring (PRM), UNIFI, BioPharma Finder, Mascot, Scaffold, Thermo, Sciex, Waters, Agilent, MALDI-MS
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Scientist: Microscopy
St. Louis, Missouri, United States
OnsiteFull Time
Aion Biosciences
Aion Biosciences: Private biotechnology developing medical devices that use acoustic and electromagnetic fields to control bioelectric tissue states.
Hands-on mammalian cell culture and microscopy experience, including sample preparation, image acquisition, quantitative analysis, and independent experimental ownership; mechanical aptitude and optical systems knowledge required.
coding agents
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Scientist 1
Hazelwood, Missouri, United States
$18/hr OnsiteFull Time
Pace Analytical Services
Pace Analytical Services: Environmental and life sciences analytical testing services network.
Bachelor's degree in Chemistry, Biochemistry, or another STEM field, or equivalent education, training, and experience. Must work effectively in laboratories and stand for extended periods.
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Senior Analytical Scientist
St. Louis, Missouri, United States
$76k-$114k/yr OnsiteFull Time
MilliporeSigma
MilliporeSigma: Merck KGaA's U.S./Canada life science business supplies research tools, bioprocessing products, and services to scientists and drugmakers.
1+ YOEBachelor's degree plus 6+ years, master's plus 2+ years, or PhD plus 1+ years of research in chemistry, biochemistry, biomedical engineering, chemical engineering, life science, or engineering. Analytical development expertise required.
ELISA, SPR, Isoelectric Focusing, CE, UV-Vis, HPLC, GC, IC, UPLC, SEC, HILIC, Microsoft Word, Microsoft Excel, Microsoft PowerPoint
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R&D Scientist
Affton, Missouri, United States
OnsiteFull Time
IRCA Group
IRCA Group: Italian professional food-ingredients manufacturer serving pastry chefs, chocolatiers, gelato makers, foodservice operators, and food manufacturers worldwide.
1+ YOEBachelor's in food science or related, 1–3 years R&D or food manufacturing experience preferred, laboratory and pilot-plant skills, Microsoft Office proficiency, able to lift 45 lb, domestic travel up to 10%.
Microsoft Word, Microsoft Excel, Microsoft Outlook
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Scientist Product Development
St. Louis, Missouri, United States
$73k-$103k/yr OnsiteFull Time
Nestlé Purina PetCare
Nestlé Purina PetCare: Nestlé-owned pet-food manufacturer serving dogs, cats, and their owners with food, treats, litter, and nutrition research.
Bachelor’s degree in Food Science or a related discipline; willingness to travel 15%; experience planning trials, executing experiments, leading projects, and documenting technical results.
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Staff Scientist (Temporary/PRN) - Neuroscience
Saint Louis, Missouri, United States
OnsitePart Time
Washington University School of Medicine
Washington University School of Medicine: Private nonprofit research university in St. Louis providing undergraduate, graduate, professional, medical education, research and patient care.
3+ YOEMaster's degree (or equivalent experience), minimum 3 years lab operations experience, experimental design and data analysis experience, able to work with biological/chemical hazards and research animals.
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Biotransformation Scientist
St. Louis, Missouri, United States
OnsiteFull Time
Inotiv
InotivNASDAQ: NOTV: Private contract research organization serving pharmaceutical, biotechnology, and medical-device researchers with nonclinical drug-development services and research models.
2+ YOEPhD with 2–5 years industrial biotransformation experience after postdoctoral training, or MSc with 5–7 years; LC-MS/MS, HRMS, bioanalytical, kinetic, and pharmacokinetic modeling expertise.
LC-MS/MS, HRMS, liquid chromatography, mass spectrometry, Microsoft?, databases
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HPLC Scientist
St. Louis or Chesterfield
OnsiteFull Time
Eurofins Scientific
Eurofins ScientificEuronext Paris: ERF: Global leader in bio-analytical testing and laboratory services.
Authorization to work in the US, experience with HPLC/SEC and gel-based assays, Bachelors or Masters in biological or chemical science, familiarity with lab documentation and attention to detail.
HPLC, SEC, UV-Vis, SOLO VPE, SDS Page, AGE, Western Blotting, CGE, Empower, OpenLabs
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3mo
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Assistant Scientist
Saint Louis, Missouri, United States
OnsiteFull Time
Terracon
Terracon: Employee-owned consulting engineering firm providing multidisciplinary technical services.
Bachelor’s degree in Environmental Science or related field; valid driver's license; non-degred candidates considered; preferred field certification.
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2mo
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Formulation & Process Development Senior Scientist
Bridgeton, Missouri, United States
OnsiteFull Time
Virbac
VirbacEuronext Paris: VIRP: Independent French animal-health pharmaceutical developing veterinary medicines for veterinarians, farmers, and pet owners worldwide.
5+ YOEBS in chemistry/pharmaceutical science/chemical engineering or higher; 5+ years pharmaceutical experience desired; expertise in formulation and process development, DOE/QbD, cGMP/GLP/GCP, technology transfer, stability testing, and mentoring junior scientists.
Quality by Design (QbD), Design of Experiments (DOE)
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Senior AI Scientist
Tempe or St. Louis
HybridFull Time
Edward Jones
Edward Jones: Financial services firm providing wealth management and investment advice.
9+ YOERequires 9+ years delivering applied data science solutions, an MS in a quantitative field, Python, statistical modeling, and expertise in at least two of ML, AI, GenAI, optimization, or agentic systems.
Python, SQL, Git, CI/CD, Databricks
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2mo
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Senior Formulation Scientist
Bridgeton, Missouri, United States
OnsiteFull Time
Balchem Corporation
Balchem CorporationNASDAQ: BCPC: Public U.S. manufacturer of specialty ingredients for nutrition, food, pharmaceutical, animal-health, plant-nutrition, and industrial markets.
5+ YOEBachelor's in food science or related with 10+ years or Master's with 5+ years; hands-on formulation and scale-up experience in beverages/frozen desserts/confections; UHT/HTST experience preferred; MS Office proficiency; strong problem solving and communication.
Microsoft Excel, Microsoft Word, Microsoft PowerPoint, Microsoft Outlook
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2mo
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Associate Staff Scientist
Hazelwood, Missouri, United States
$92k-$135k/yr OnsiteFull Time
bioMérieux
bioMérieuxEuronext Paris: BIM: Public French in-vitro diagnostics serving hospitals, laboratories, and food and pharmaceutical industries.
5+ YOEBachelor's in chemistry/materials science/chemical engineering, 5+ years lab experience in formulation/analytical/sol-gel chemistry, regulated product development experience, strong written/verbal communication, MS Office proficiency.
Microsoft Outlook, Microsoft Teams, Microsoft Word, Microsoft Excel
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