63 physical scientist jobs at 25 companies in Ontario, CA
2d
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Social Scientist/Biological Scientist/Physical Scientist
Salt Lake City or Seattle or Phoenix or Los Angeles or San Francisco or Denver or Washington or Miami or Atlanta or Chicago or Indianapolis or New Orleans or Boston or Minneapolis or Kansas City or Albuquerque or New York or Oklahoma City or Portland or Austin
$126k-$164k/yr OnsiteFull Time, Temporary
1+ YOEBachelor's-level science education or equivalent experience and one year of specialized experience at GS-13 level in scientific guidance, national programs, project planning, prioritization, and stakeholder engagement.
E-Verify, Microsoft Word
1mo
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Clinical Lab Scientist
Anaheim, California, United States
$50-$58/hr OnsiteFull Time
2+ YOEBachelor's or doctoral degree in chemical, physical, biological, clinical laboratory science or medical technology; current California Clinical Laboratory Scientist license; ASCP preferred; ~2 years acute care lab experience preferred.
1mo
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Clinical Lab Scientist I
San Juan Capistrano, California, United States
$40-$56/hr OnsiteFull Time
0+ YOEPerforms moderate to complex clinical laboratory tests; requires bachelor’s in medical technology or life/physical sciences and state Clinical Laboratory Scientist licensure; 0–3 years lab experience.
Microsoft Word, Microsoft Excel, Microsoft Outlook, Electronic medical records (EMR)
1mo
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Senior Scientist
Pasadena, California, United States
$134k-$165k/yr OnsiteFull Time
10+ YOE8+ MgmtBS in Physics, Astronomy, or Engineering; 10+ years high-precision optics experience; 8+ years mentoring; expertise in optical design, coatings, and precision optical metrology; MS/PhD preferred; MS Project experience preferred.
Microsoft Project
1mo
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Medical Laboratory Scientist - Clinical Laboratory
Apple Valley, California, United States
$52-$80/hr OnsitePart Time
1+ YOEBachelor's degree, specified coursework in chemistry/biology/physics, 1-year internship (prerequisite to state exam), and California Clinical Laboratory Scientist license required; 2 years hospital lab experience preferred.
3mo
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Scientist - Plasma Diagnostics
Foothill Ranch, California, United States
$110k-$130k/yr OnsiteFull Time
PhD in plasma physics with in situ diagnostics; hands-on diagnostics experience; data analysis and reporting; programming in Python.
Langmuir probes, retarding field analyzers, fast ion loss detectors, pyrobolometers, thermo-optical arrays, DAQ systems, oscilloscopes, function generators, high-vacuum systems, Python
1mo
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Research Scientist
Pasadena or United States
$100k-$135k/yr RemoteFull Time
Graduate degree in physical/environmental/earth/applied sciences, experience with methane emission sectors and remote sensing, ability to work independently and manage multiple projects.
Git
2mo
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CLINICAL LABORATORY SCIENTIST I (BLOOD BANK)
Los Angeles, California, United States
$95k-$135k/yr OnsiteFull Time
0.5+ YOESix months experience as Clinical Laboratory Scientist; CA CLS license or Limited CLS license in a qualified specialty; meet physical requirements; online filing and exam process as described.
1mo
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Project Scientist Pool
Irvine, California, United States
$79k-$209k/yr OnsiteFull Time, Part Time
Ph.D. in physical climate, atmospheric chemistry, biogeochemistry or related field; proven research track record; submit CV, research statement, and references.
2mo
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Research Scientist, R&D (2026)
Los Angeles, California, United States
$100k-$175k/yr HybridFull Time
3+ YOEPhD or Master’s in CS/Physics/Mathematics; 3+ years R&D in graphics/physics/ML; advanced C++ with VCS and testing; strong communication; background in discrete geometry or related areas.
C++, CUDA, Metal, WebGPU
2w
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Project Scientist - Environmental Solutions
Irvine, California, United States
$60k-$75k/yr FieldFull Time
1+ YOEBachelor's in geology/environmental science/engineering, 1–3 years environmental field experience, current 40-hour HAZWOPER, valid driver’s license, ability to perform physical fieldwork, proficiency with Microsoft Word and Excel.
Microsoft Word, Microsoft Excel
1mo
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Space Photovoltaics Research Scientist
El Segundo, California, United States
$117k-$176k/yr OnsiteFull Time
8+ YOEPh.D. in a STEM field, 8+ years experience in opto-electronic materials or device physics, proficiency with electro-optical characterization techniques, data analysis/programming (Python, MATLAB, Origin), project leadership, ability to obtain U.S. security clearance.
Python, MATLAB, Origin
1w
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Computational Scientist, Quantum Energy Systems
Torrance, California, United States
OnsiteFull Time
PhD-level expertise in computational materials science, condensed-matter physics, or computational chemistry; production Python or C++ coding; simulation package fluency; and experience connecting simulations to experimental outcomes.
Python, C++, density functional theory, molecular dynamics, finite-element modeling
2w
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Project Scientist - CSST or CAC
Irvine, California, United States
$29-$45/hr FieldPart Time
2+ YOE2+ years in regulated materials/industrial hygiene, bachelor’s degree in environmental science or related field, CAC or CSST required, CIH preferred, valid driver’s license, ability to pass background/drug/physical checks.
2mo
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Senior Applied Scientist, Safe Locomotion, Compass
Pasadena, California, United States
$167k-$226k/yr OnsiteFull Time
3+ YOEPhD or Master's+6yrs, 3+ yrs applying RL to physical robots, sim-to-real expertise, strong legged-robot dynamics and control knowledge, Python and deep learning framework proficiency, experience with robotics physics simulators, publication record.
Python, PyTorch, JAX, Isaac Gym/Sim, MuJoCo, PyBullet
2mo
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Environmental Scientist I/II/III - AGSC
Redding or Sacramento or Eureka or Santa Rosa or Bakersfield or Los Angeles or Riverside or San Diego
RemoteFull Time
Bachelor’s in Physical/Environmental Sciences; CA QSP or QSD; driver license; utility project experience; MS Office proficiency.
MS Office
1mo
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Staff Environmental Scientist/Engineer
Santa Ana or California
$71k-$80k/yr HybridFull Time
0+ YOEBachelor's in environmental sciences or engineering, 0–2 years environmental compliance experience, valid driver's license, Microsoft Office proficiency, strong communication, ability to perform fieldwork and physical canvassing.
Microsoft Windows, Microsoft Word, Microsoft Excel, Microsoft PowerPoint, Microsoft Outlook, Adobe, Foxit, Google Earth
2w
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Clinical Laboratory Scientist II
Inglewood, California, United States
$37-$51/hr OnsiteFull Time
2+ YOEBachelor's in biological/chemical/physical/clinical laboratory science or medical technology, California CLS license, minimum 2 years clinical laboratory experience covering all lab areas, proficiency with testing, QC, venipuncture, and LIS/POC systems.
Laboratory Information System (LIS), Point-of-Care (POC)
2mo
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Environmental Scientist I/II/III - AGSC
California or Redding or Sacramento or Eureka or Santa Rosa or Bakersfield or Los Angeles or Riverside or San Diego
$60k-$98k/yr FieldFull Time
0+ YOEBachelor's degree in physical or environmental sciences or related field, California QSP or QSD certification, utility project experience, driver's license, Microsoft Office proficiency, and technical communication skills.
Microsoft Office Suite, GIS, CAD
2mo
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AI/ML Scientist, Planetary Science
Long Beach or New York City
$115k-$159k/yr HybridFull Time
PhD in ML/CS/physics; strong in transfer learning; multi-modal data fusion; autonomous science; data-driven planetary research.
Python, TensorFlow, PyTorch, NumPy
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