100 senior scientist jobs at 47 companies in Perris, CA
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Senior Data Scientist
Irvine, California, United States
$108k-$153k/yr OnsiteFull Time
4+ YOEBachelor's in a related field plus 4 years (or Master’s plus 3) experience; expertise in clinical/product domain modeling, statistical methods, and regulatory-grade model documentation.
statsmodels, lifelines, scikit-survival, PyMC, SHAP, Captum, Python, SQL, SAS, Microsoft Power BI, Tableau Prep, PyTorch, TensorFlow, MLflow, MONAI, pydicom, SimpleITK, DoWhy, EconML, Optuna, Ray Tune, R, JAX
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Senior Research Scientist
Orange, California, United States
$85k-$90k/yr OnsiteFull Time
1+ YOEPh.D. in philosophy/psychology/neuroscience, 1+ year postdoctoral research, 5+ peer-reviewed publications, proficiency with MATLAB/JASP/R, EEG experience, strong writing and presentation skills.
MATLAB, JASP, R, EEG
2w
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Principal Clinical Scientist
Aliso Viejo, California, United States
$148k-$194k/yr OnsiteFull Time
5+ YOEMaster's degree in relevant science/medicine, 5+ years clinical research scientist experience, GCP knowledge, clinical protocol development, strong writing and communication, analytical skills.
PubMed, MedLine
2w
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SENIOR ENVIRONMENTAL SCIENTIST (SPECIALIST)
Sacramento or Riverside
$8k-$11k/mo HybridFull Time
Oversee escalated waste tire enforcement, develop enforcement actions, conduct inspections, prepare reports; must have valid California driver's license/REAL ID and ability to travel.
Microsoft Word, Microsoft Excel, Microsoft SharePoint, PowerPoint, Microsoft Teams
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Senior Environmental Scientist III
Fullerton, California, United States
$83k-$125k/yr OnsiteFull Time
5+ YOEB.S. in environmental science/engineering, 5+ years experience, CPSWQ or CPESC and QSD/QSP and QISP certifications, valid California driver’s license, ability to lift up to 50 lbs, proficient in Microsoft Office, strong analytical and communication skills.
Microsoft Office Suite, ArcGIS
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Senior Principal Data Scientist, AEC
California or Washington or New York or British Columbia or Ontario or Irvine
$159k-$286k/yr RemoteFull Time
10+ YOE10+ years in data science/applied ML focused on product analytics and user behavior modeling; expertise in predictive modeling, instrumentation, AI evaluation, and experimentation; strong communication and technical leadership.
LLMs, MCP, RAG architectures, LLM-as-a-Judge, A/B testing
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Staff Scientist
Irvine, California, United States
$131k-$219k/yr OnsiteFull Time
5+ YOEBachelor's in a scientific discipline with 7+ years (or MS with 5+ years, PhD with 2+ years) in medical device/GxP-regulated industry; microbiology/fermentation experience, method development/validation, familiarity with QSR/FDA/ISO, statistical analysis (Minitab), and process improvement (Six Sigma/Lean).
Minitab, Six Sigma, Lean, DMADVV, DMAIIC
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Project Scientist Pool Ad - Clinical Pharmacy Practice
Irvine, California, United States
$77k-$202k/yr OnsiteFull Time
Doctorate (M.D., Ph.D., or PharmD) required; submit CV and three references (contact information only). Open recruitment pool for future Project Scientist appointments.
4d
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Sr. Scientist/Sr. Scientist II - Pharmacology
Aliso Viejo or San Clemente or Burlington
$119k-$148k/yr OnsiteFull Time
4+ YOEPh.D. in a relevant life science discipline and 4+ years of industry experience; expertise in ocular pharmacology, study design, data interpretation, regulatory submissions, and cross-functional research collaboration.
CROs, in vitro, ex vivo, in vivo, IND, NDA, BLA
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Artificial Intelligence Scientist IV
Los Angeles or Irvine
$208k-$354k/yr OnsiteFull Time
10+ YOEMS in CS/AI/ML required (PhD preferred), 10+ years relevant experience, expertise in LLMs, generative and agentic AI (RAG, PEFT, instruction fine-tuning, prompt engineering), transformers and deep learning, publication record, ability to collaborate with engineering and mentor scientists.
Deep Neural Networks, Large Language Models (LLMs), RAG, Transformers, Agentic AI
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Senior Data Scientist (Onsite)
Irvine, California, United States
$138k-$200k/yr OnsiteFull Time
3+ YOEBachelor's in a quantitative field required (Master's preferred); 3+ years model development experience required (5+ preferred); skills in Python/R, ML methods, SQL, LLMs, cloud, visualization, and AI-assisted tools.
Python, R, SPSS Modeler, SAS, Oracle CVUE, CRM, IR&A Data Warehouse, College Board, IPEDS, National Student Clearing House, Common Dataset, Claude Code, LLM, Microsoft Azure, AWS, Google Cloud, Microsoft Power BI, Tableau, Microsoft SQL Server, Microsoft Excel
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Scientist (Mass Spectrometry)
San Juan Capistrano, California, United States
$85k-$110k/yr OnsiteFull Time
BS in biology/chemistry required; 5-7 years HPLC and LC-MS/MS experience (reduced with advanced degree); ability to design, validate assays and prepare technical documentation.
HPLC, LC-MS/MS
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Principal Scientist- Search
New York City or San Francisco or Los Angeles or Irvine or McLean or Washington
$212k-$394k/yr HybridFull Time
8+ YOEPhD and 8+ years building and deploying production AI systems; deep expertise in information retrieval, search, NLP, RAG, knowledge graphs, LLMs; strong product sense and leadership skills.
Python, PyTorch, Hugging Face, Azure ML, Azure AI Foundry, AWS SageMaker
3w
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Scientist, Analytical Development
Tustin, California, United States
$110k-$137k/yr OnsiteFull Time
8+ YOEBS in biochemistry/chemistry/biology required, 8+ years analytical/QC biotech experience, method development and validation experience with HPLC/CE/ELISA, GMP and report/procedure writing, supervisory experience.
ELISA, HPLC, CE, SDS-PAGE, Maurice
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Innovation Scientist
Orange, California, United States
$115k-$130k/yr OnsiteFull Time
5+ YOEBS in a relevant science, 5+ years R&D/manufacturing experience in dietary supplements, formulation and prototyping experience, strong scientific storytelling, cross-functional collaboration, and customer-facing technical support.
E-Verify
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Principal Scientist
Carlsbad, California, United States
$113k-$170k/yr OnsiteFull Time
15+ YOEBS or MS in Chemistry, Analytical Science, or related field and 15+ years in GLP/GMP analytical environments, with method validation, analytical testing, mentoring, quality systems, and regulatory experience.
qPCR, ddPCR, HPLC, CE-SDS, ELISA, FTIR, Gel Electrophoresis, UPLC, PCR, Laboratory Information Management System
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Principal Scientist
Carlsbad, California, United States
$113k-$170k/yr OnsiteFull Time
15+ YOEBS or MS in Chemistry, Analytical Science, or related field, or equivalent experience; 15+ years in GLP/GMP analytical environments with method validation, transfer, leadership, and mentoring experience.
qPCR, ddPCR, HPLC, CE-SDS, ELISA, FTIR, Gel Electrophoresis, Microsoft Excel, Laboratory Information Management System
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Staff Scientist
Irvine, California, United States
OnsiteFull Time
7+ YOEBachelor's in a scientific discipline plus 7+ years (or Master's/PhD with fewer years); experience in GxP-regulated medical device/product development, fermentation and microbiology, validation (IQ/OQ/PQ), statistical analysis (Minitab), and familiarity with QSR/FDA/ISO standards.
Minitab, Six Sigma, Lean, DMADVV, DMAIIC, IQ/OQ/PQ, ISO 13485, AAMI
3d
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Clinical Scientist
Irvine, California, United States
$160k-$170k/yr RemoteFull Time
5+ YOEPhD, PharmD, or advanced medical/life sciences degree preferred; 5+ years in medical devices, including 2+ years writing clinical investigation plans and clinical study reports; strong clinical analysis and medical writing skills.
Microsoft Office, Adobe Acrobat
4d
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Senior Formulation Scientist, Sterile & Peptide Product Development
Los Alamitos, California, United States
$130k-$155k/yr OnsiteFull Time
6+ YOEPh.D. with 6–8+ years or B.S./M.S. with 8–10+ years in sterile injectable and peptide formulation. Requires parenteral development, stability studies, CGMP, ICH, USP/FDA 503B, analytical, scale-up, and technology transfer experience.
UPLC, HPLC, mass spectrometry, ICH Q1A(R2), Q5C, CGMP, USP, FDA 503B, OOS, OOT, CAPA, SOP
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