68 senior scientist jobs at 36 companies in Union, MO
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Senior Scientist
Lenexa or Topeka or Manhattan or Wichita or Columbia or Saint Louis
OnsiteFull Time
8+ YOEBachelor's or Master's in environmental science/geology,8+ years environmental consulting experience focused on building sciences,project management and technical assessment skills,valid driver's license,and willingness to travel for field work.
1w
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Senior Scientist
St. Louis, Missouri, United States
$106k-$158k/yr OnsiteFull Time
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
1w
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Senior Scientist
St. Louis, Missouri, United States
$106k-$158k/yr OnsiteFull Time
5+ YOERequires a chemistry-related BS with 5–7+ years, master's with 3–5+ years, or PhD with 0–1+ years; advanced LC-MS, biomolecule sample preparation, and collaborative 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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Data Scientist, Senior
St. Louis, Missouri, United States
$120k-$150k/yr OnsiteFull Time
TS/SCI clearance required (CI/Poly obtainable), intelligence analysis experience, senior-level Python scripting, designing scalable processes for large datasets, creating visualizations, and managing multiple projects.
Python, JEMA, Brewlytics, ArcModel Builder
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Senior Data Scientist
St. Louis, Missouri, United States
OnsiteFull Time
Active TS/SCI clearance, senior-level Python and data science experience supporting intelligence missions, scalable data pipeline and visualization skills, ability to operate independently and lead technical initiatives.
Python, JEMA, Brewlytics, ArcGIS ModelBuilder
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Senior Scientist
St. Louis, Missouri, United States
$106k-$158k/yr OnsiteFull Time
0+ YOERequires chemistry degree and 0–7+ years of relevant experience depending on education, advanced LC-MS instrumentation, biomolecule sample preparation, and effective independent and team communication.
LC-MS, Multiple Reaction Monitoring (MRM), Parallel Reaction Monitoring (PRM), UNIFI, BioPharma Finder, Mascot, ScaffoldPro, Thermo, Sciex, Waters, Agilent, MALDI-MS
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Formulation & Process Development Senior Scientist
Bridgeton, Missouri, United States
OnsiteFull Time
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
Arizona or Tempe or Missouri or St. Louis or United States
HybridFull Time
9+ YOE9+ years applied data science experience; MS required (PhD preferred) in a quantitative field; strong Python, SQL, Git, Databricks, CI/CD experience; expertise in statistical modeling, ML/GenAI/optimization; productionizing models and influencing stakeholders.
Python, SQL, Git, Databricks, CI/CD
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Senior Formulation Scientist
Bridgeton, Missouri, United States
OnsiteFull Time
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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Senior Data Scientist
Denver or St. Louis or Sterling or Springfield
$82k-$172k/yr OnsiteFull Time
8+ YOEBachelor's in related field,8+ years data science experience,expert Python or R,SQL proficiency,production ML deployment experience,and TS/SCI clearance with polygraph willingness.
Python, R, SQL
2w
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Senior Data Scientist
Saint Louis, Missouri, United States
$117k-$151k/yr HybridFull Time
6+ YOEMaster's in a quantitative field, 6+ years data science experience, proficiency with Python or R, ML libraries, advanced SQL, Microsoft SQL Server and Snowflake experience, strong communication; U.S. work authorization required.
Python, R, Scikit-Learn, XGBoost, TensorFlow, PyTorch, Microsoft SQL Server, Snowflake, SQL
5d
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Senior Data Scientist
New York City or Milwaukee or Dallas or Columbus or Kirkland or Cincinnati or Cleveland or Oklahoma City or Austin or Albany or Chicago or St. Petersburg or Hartford or Pittsburgh or St. Louis or Miami or Sacramento or Raleigh or Minneapolis or Mountain View or Scottsdale or San Francisco or Morristown or Denver or Boston or Philadelphia or Des Moines or Overland Park or Los Angeles or Charlotte or Walnut Creek or Carmel or Seattle or Houston or Arlington or Atlanta or Redmond or Bentonville or Beaverton or Nashville or Detroit or San Diego
$87k-$294k/yr HybridFull Time
6+ YOE6+ years in data science, AI, analytics, Responsible AI, or consulting; bachelor's or master's in a quantitative field; Python, SQL, machine learning, generative AI, governance, and client leadership experience.
Python, pandas, NumPy, scikit-learn, PyTorch, TensorFlow, XGBoost, SQL, MLOps, GenAIOps, LLMOps, AWS, Microsoft Azure, Google Cloud
4d
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Senior Data Scientist
Albany or Arlington or Atlanta or Austin or Beaverton or Bentonville or Boston or Carmel or Charlotte or Chicago or Cincinnati or Cleveland or Columbus or Culver City or Denver or Des Moines or Detroit or Hartford or Houston or Irving or Kirkland or Miami or Milwaukee or Minneapolis or Morristown or Mountain View or Nashville or New York City or Oklahoma City or Overland Park or Philadelphia or Pittsburgh or Raleigh or Redmond or Sacramento or San Diego or San Francisco or Scottsdale or Seattle or St. Louis or St. Petersburg or Walnut Creek or United States or Los Angeles
$80k-$294k/yr HybridFull Time
6+ YOERequires 6+ years in data science, AI, analytics, Responsible AI, consulting, governance, or related fields; quantitative bachelor's or master's degree; Python, SQL, ML, AI governance, and client leadership expertise.
Python, pandas, NumPy, scikit-learn, PyTorch, TensorFlow, XGBoost, SQL, AWS, Microsoft Azure, Google Cloud, MLOps, GenAIOps, LLMOps, APIs, Microsoft Word
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Senior Analytical Scientist
St. Louis, Missouri, United States
$76k-$114k/yr OnsiteFull Time
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
2mo
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Senior Data Scientist
St. Louis, Missouri, United States
OnsiteFull Time
8+ YOE8 years data science/ML experience; hands-on Python and SQL; experience with A/B testing, causal ML/matching models/AutoML; strong statistical knowledge, problem-solving, and stakeholder communication.
Python, SQL, AutoML
2w
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Senior Wetland Scientist
Overland Park or Kansas City or Wichita or St. Louis
HybridFull Time
5+ YOEBachelor's in environmental science or related field, 5+ years wetland delineation experience, knowledge of regional vegetation/soils, valid driver’s license, ArcGIS Field Maps/Survey123 proficiency preferred.
ArcGIS Field Maps, Survey123, GPS
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Senior Data Scientist
Denver or Springfield or Sterling or St. Louis
$82k-$172k/yr OnsiteFull Time
8+ YOETS/SCI clearance with polygraph, Bachelor or equivalent, 8+ years experience, expert Python/R and SQL, ML production experience, data visualization, and geospatial experience preferred.
Python, R, SQL
2w
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Senior Wetland Scientist
Kansas City or St. Louis
FieldFull Time
5+ YOEBachelor's degree, 5–10 years wetland delineation and field experience, valid driver’s license, ArcGIS Field Maps/Survey123 and GPS experience, strong communication and leadership; ability to travel up to 60%.
GPS, ArcGIS Field Maps, Survey123
3w
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Senior AI Scientist
Tempe or St. Louis
HybridFull Time
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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Senior Scientist - Neurology
St. Louis, Missouri, United States
$63k-$115k/yr OnsiteFull Time
3+ YOEPhD or terminal degree (or equivalent), ~3 years postdoctoral experience, expertise in cellular/molecular/neurodegeneration techniques, mentoring, grant and manuscript contributions, and laboratory safety compliance.
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