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15 lead data scientist jobs at 10 companies in Ontario, CA

3d
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Data Scientist Lead
Costa Mesa, California, United States
$146k-$195k/yr HybridFull Time
Auto Club Enterprises
Auto Club Enterprises: Provides roadside assistance, insurance, and travel services to members.
3+ YOE1+ Mgmt3+ years data science experience, 1+ year leading projects, bachelor’s in quantitative field, advanced SQL and Python, cloud/data platform experience, ML production deployment, and strong communication skills.
SQL, Python, AWS, Google Cloud Platform (GCP), Databricks, Snowflake, Tableau, Power BI
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2w
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Data Scientist Lead
Costa Mesa, California, United States
$146k-$195k/yr HybridFull Time
Auto Club Enterprises
Auto Club Enterprises: Provides roadside assistance, insurance, and travel services to members.
Proven experience in statistics and data analysis, proficient with SQL and either Python or R, experience with Tableau and Excel, strong communication and Agile experience.
SQL, Python, R, Microsoft Excel, Tableau
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2w
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Data Scientist Lead
Costa Mesa, California, United States
$146k-$195k/yr HybridFull Time
Auto Club Enterprises
Auto Club Enterprises: Provides roadside assistance, insurance, and travel services to members.
Proven statistics and data analysis experience; proficiency with SQL and either Python or R; experience creating dashboards and communicating findings to stakeholders; Agile team experience preferred.
SQL, Python, R, Microsoft Excel, Tableau
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2d
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Lead Data Scientist, AdTech
Los Angeles or Portland or San Diego or Seattle
$175k-$200k/yr RemoteFull Time
Launch Potato
Launch Potato: Digital media operating a portfolio of consumer brands.
5+ YOE5+ years applied data science in digital/performance marketing; strong modeling fundamentals; hands-on ML deployment in AWS; expert Python and SQL; experience with bandits, ranking, LTV and ROAS-focused models.
Python, SQL, AWS, Looker, LLMs
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3w
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Lead Data Scientist (Context Engineering)
Irvine or El Segundo
$154k-$193k/yr OnsiteFull Time
Rivian
RivianNASDAQ: RIVN: Designs and manufactures electric vehicles and charging networks.
8+ YOE8+ years in data architecture/systems or data engineering; Bachelor's in CS/Info Systems/Data Engineering required, Master's preferred; expertise in semantic modeling, Databricks, vector DBs, LangChain/LlamaIndex, Python and SQL; MarTech/CRM integration experience.
Databricks, Unity Catalog, Delta Lake, Vector Search, LangChain, LlamaIndex, Python, SQL, Salesforce, Braze, CDP, LLMs
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3w
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Lead Data Scientist (Agentic Solutions)
Irvine or El Segundo
$171k-$214k/yr OnsiteFull Time
Rivian
RivianNASDAQ: RIVN: Designs and manufactures electric vehicles and charging networks.
5+ YOE5+ years in ML or applied data science; expertise with agentic frameworks, SLMs, LoRA/QLoRA, token-efficient architectures; expert Python and strong SQL; Bachelor's required (Master/PhD preferred).
LangChain, LlamaIndex, Haystack, Phi, Mistral, Gemma, LoRA, QLoRA, Python, SQL, Databricks, Spark, Delta Lake, Snowplow
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2w
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Data Scientist, Principal
Oakland or Washington or Ohio or District of Columbia or California or Long Beach or Arizona or Colorado or Connecticut or Florida or Georgia or Maryland or Minnesota or Nevada or Oregon or El Dorado Hills or San Diego or Woodland Hills or Alabama or Illinois or Virginia or Wisconsin or Texas or New York
$182k-$273k/yr HybridFull Time
Ascendiun
Ascendiun: Nonprofit parent overseeing health insurance and clinical service organizations.
8+ YOEAdvanced experience in applied AI/ML and software development, strong Python engineering, hands-on with deep learning and LLM frameworks, experience building production AI applications and leading ML design.
Python, PyTorch, TensorFlow, LangChain, LangGraph, SQL, Spark, Azure, Google Cloud, AWS
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3w
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Staff Data Scientist
Irvine, California, United States
$126k-$178k/yr OnsiteFull Time
Edwards Lifesciences
Edwards LifesciencesNYSE: EW: Designs and manufactures medical devices for structural heart disease.
2+ YOEAdvanced degree in CS/engineering/biostatistics or related plus multiple years experience (varies by degree); expertise in modeling, validation, and scaling ML for healthcare; ability to lead technical strategy and mentor others.
Ray, PyTorch, PyTorch Lightning, DeepSpeed, JAX, CUDA, C++
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3mo
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Senior Data Scientist, Data Analytics & Reporting (N380)
Los Angeles, California, United States
$9k-$13k/mo HybridFull Time
Heluna Health
Heluna Health: Supports population health through program management and fiscal sponsorship.
2+ YOE2+ MgmtTwo years of complex data science projects; bachelor or higher in data science-related field; six years of experience with two in lead role; driver license; Live Scan clearance.
R, Python, Power BI, Tableau
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2mo
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Tech Lead - Data Scientist
Newport Beach, California, United States
$220k-$250k/yr OnsiteFull Time
Obsidian Security
Obsidian Security: Provides cybersecurity and threat detection for enterprise SaaS applications.
6+ YOE2+ Mgmt6+ years in data science/ML with 2+ years in technical leadership; production ML/data systems; Python proficiency; security domain awareness; solving complex problems with data and ML.
Python, Machine Learning Frameworks
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2mo
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Senior Data Scientist Advisor (Pomona, CA, US, 91768)
Pomona, California, United States
HybridFull Time
Edison International
Edison InternationalNYSE: EIX: Generating and distributing electricity to customers in Southern California.
7+ YOELead data science initiatives; develop AI models for remote sensing; collaborate with stakeholders.
Python, R, SQL, Tableau, Power BI, AWS, Azure, Google Cloud
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2d
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Lead Applied Scientist, Marketing
Los Angeles or Portland or San Diego or Seattle
$175k-$200k/yr RemoteFull Time
Launch Potato
Launch Potato: Digital media operating a portfolio of consumer brands.
5+ YOE5+ years applied data science experience in performance/leadgen or digital marketing; strong modeling fundamentals; hands-on ML in AWS; expertise in multi-armed bandits, recommendation/ranking, LTV modeling; expert Python and SQL.
AWS, Python, SQL, Looker, Google, Meta
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2mo
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Senior Scientist
Pasadena or Sudbury or Chicago or Tampa or Phoenix
$105k-$120k/yr HybridFull Time
Advocates for Human Potential
Advocates for Human Potential: Provides consulting and research services for human services systems.
5+ YOEPh.D.,5+ years leading evaluation-focused proposals and projects, expertise in substance use/rural health/criminal justice, experience with federal contracts and SAMHSA data tools.
Stata, REDCap, Dedoose, Microsoft Word, Microsoft Outlook, Microsoft PowerPoint, Microsoft Excel, citation management software
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1mo
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Staff Environmental Scientist/Certified Site Surveillance Technician
Irvine, California, United States
$75k-$85k/yr HybridFull Time
Socotec
Socotec: Provides testing, inspection, and certification services for building safety.
2+ YOEBachelor's in engineering/geology/environmental science required; CSST or CAC and lead inspector/assessor/project monitor/sampling technician certifications required; 2+ years related experience; valid driver’s license; fieldwork, data collection, and technical writing skills.
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2mo
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Director, Decision Science AI/ML Engineering & Ops
Burbank or Lake Buena Vista
$218k-$307k/yr HybridFull Time
The Walt Disney Company
The Walt Disney CompanyNYSE: DIS: Produces movies, operates theme parks, and provides streaming services.
12+ YOE12+ years of experience leading decision scientists/ML engineers; strong statistical and modeling fluency; proficient in Python/SQL/R; able to deploy production-grade decision-science software; leadership and collaboration skills; experience with GitLab/GitHub, Docker, CI/CD.
Python, R, SQL, GitLab, GitHub, Docker, CI/CD
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