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Accelerator Physics Jobs in California (NOW HIRING)

Pacific Fusion

Senior Mechanical Engineer

San Leandro, CA · On-site

$138K - $263K/yr

Experience in fusion, plasma physics, accelerator physics, defense, or other high-consequence technical environments. * Familiarity with vacuum systems, cryogenics, high-voltage hardware, or pulsed ...

Jobtailor

Senior Medical Physicist

Palm Springs, CA · On-site

$120 - $180/hr

... equipment, including accelerator monitor unit calibration * Acquire beam data for treatment ... Provide physics consultation to radiation oncology personnel and radiation oncologists regarding ...

memorial care

Radiation Physicist

Long Beach, CA · On-site

$205K - $298K/yr

... medical physics students, and radiation therapy students to maintain a high level of ... Reviews calibration data for the Linear Accelerators and HDR on appropriate basis as outlined by ...

memorial care

Radiation Physicist

Long Beach, CA · On-site

$205K - $298K/yr

... medical physics students, and radiation therapy students to maintain a high level of ... Reviews calibration data for the Linear Accelerators and HDR on appropriate basis as outlined by ...

MemorialCare

Radiation Physicist

Long Beach, CA · On-site

$205K - $298K/yr

... medical physics students, and radiation therapy students to maintain a high level of ... Linear Accelerators and HDR on appropriate basis as outlined by AAPM. • Performs accurate ...

MemorialCare

Radiation Physicist

Long Beach, CA · On-site

$205 - $298/hr

... medical physics students, and radiation therapy students to maintain a high level of ... Reviews calibration data for the Linear Accelerators and HDR on appropriate basis as outlined by ...

TAE

Scientist - Applied Laser Physics

Foothill Ranch, CA · On-site

$125K - $140K/yr

Established years of experience with optical diagnostics or laser systems in a plasma, accelerator ... PhD in Physics, Applied Physics, or Optical Engineering * Preferred: Specialization in laser ...

DensityAI

Hardware Reliability Engineer

Mountain View, CA

$120K - $152K/yr

Conduct physics-of-failure modeling for advanced accelerator packaging; assess thermal, mechanical, and electrical stressors; define and execute stress-test protocols including thermal cycling ...

DensityAI

Hardware Reliability Engineer

Mountain View, CA

$120K - $152K/yr

Conduct physics-of-failure modeling for advanced accelerator packaging; assess thermal, mechanical, and electrical stressors; define and execute stress-test protocols including thermal cycling ...

DensityAI

Hardware Reliability Engineer

Mountain View, CA · On-site

$120K - $152K/yr

Conduct physics-of-failure modeling for advanced accelerator packaging; assess thermal, mechanical, and electrical stressors; define and execute stress-test protocols including thermal cycling ...

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Accelerator Physics information

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How much do accelerator physics jobs pay per hour?

As of Aug 22, 2026, the average hourly pay for accelerator physics in California is $19.80, according to ZipRecruiter salary data. Most workers in this role earn between $12.36 and $25.14 per hour, depending on experience, location, and employer.

What is accelerator physics?

An Accelerator Physics job involves the study, design, operation, and improvement of particle accelerators, which are used in scientific research, medicine, and industry. Professionals in this field work on beam dynamics, electromagnetic fields, and advanced technologies to enhance accelerator performance. They may develop new accelerator concepts, troubleshoot operational issues, and collaborate with physicists, engineers, and computational scientists. These roles are found in national laboratories, universities, and private companies specializing in accelerator technology.

What does an accelerator physicist do?

Accelerator physicists are responsible for designing, testing, and optimizing particle accelerators, often collaborating with engineers and technicians to maintain and modify equipment. Their day-to-day tasks may include conducting experiments, analyzing data, running computational simulations, troubleshooting technical issues, and documenting results for research publications. They also participate in project meetings and may contribute to facility upgrades or new accelerator development. The role often requires balancing hands-on work in laboratories with theoretical calculations and computer modeling, fostering a dynamic and intellectually stimulating work environment.

What are the key skills and qualifications needed to thrive in accelerator physics?

To excel in Accelerator Physics, a strong background in physics or engineering, typically at the PhD level, and deep knowledge of particle accelerators are required. Familiarity with simulation software, data acquisition systems, and control systems such as EPICS is crucial, and relevant certifications in radiation safety or laboratory practices may also be necessary. Effective problem-solving, teamwork, and communication skills help facilitate interdisciplinary collaboration and the successful execution of complex experiments. These capabilities enable professionals to troubleshoot sophisticated equipment, contribute to scientific innovation, and ensure safe and efficient facility operations.

What are the most commonly searched types of Accelerator Physics jobs in California?

The most popular types of Accelerator Physics jobs in California are:

What are popular job titles related to Accelerator Physics jobs in California?

For Accelerator Physics jobs in California, the most frequently searched job titles are:

What job categories do people searching Accelerator Physics jobs in California look for?

The top searched job categories for Accelerator Physics jobs in California are:

Accelerator Physics jobs near you
Infographic showing various Accelerator Physics job openings in California as of August 2026, with employment types broken down into 1% As Needed, 79% Full Time, 19% Part Time, and 1% Contract. Highlights an 76% Physical, 2% Hybrid, and 22% Remote job distribution, with an average salary of $41,184 per year, or $19.8 per hour.

Senior Mechanical Engineer

Pacific Fusion

San Leandro, CA • On-site

$138K - $263K/yr

Full-time

Medical, Dental, Vision, Retirement, PTO

Re-posted 22 days ago

Job description

About Pacific Fusion
Pacific Fusion was founded in 2023 with the mission to power the world with abundant, affordable, clean energy.
We are rapidly designing and building a pulser-driven inertial fusion system to achieve net facility gain (more fusion energy output than stored energy input). In parallel, we are developing the key components required to build affordable fusion systems.
Our plans are ambitious. We have raised over $900M so far from incredible investors, resourcing us to deliver on these plans. We are bringing together the best scientists, engineers, and operators from the fusion community, hard tech industry, and other sectors. We are united by a shared sense of urgency to provide clean power for the world, particularly managing climate change while meeting growing global energy demand. You can read more about us in this letter from our founders.
Why This Role Matters
Pacific Fusion is seeking an exceptional Senior Mechanical Engineer to help create the path to commercial fusion energy. You will help with the design, analysis, integration, and validation of mechanical systems and components across our advanced fusion energy platform. This role sits at the intersection of precision engineering and first-of-kind technology, demanding both deep technical expertise and the creative problem-solving mindset needed to tackle challenges no one has solved before. You will lead collaborative projects, mentor junior engineers, and play a vital role in driving our overall development effort.
What You'll Do
  • Own assigned mechanical scope end-to-end, providing technical direction to multidisciplinary teams to translate system requirements into robust, deliverable designs
  • Provide subject matter expertise in mechanical design and analysis for advanced diagnostic instrumentation, from concept through release
  • Develop precision motion and thermal management solutions compatible with high-vacuum and radiation environments
  • Define and verify mechanical alignment requirements for optical and detector systems, coordinating with metrology and assembly teams
  • Apply optomechanical design principles for mirrors, lenses, and optical mounts to ensure precision alignment and performance of diagnostic systems
  • Create and maintain 3D CAD models and 2D fabrication drawings with GD&T for machined, sheet-metal, and additive-manufactured components
  • Perform FEA (structural, thermal) to validate designs against shock, vibration, and thermal loads expected in pulsed fusion experiments
  • Drive hardware from prototype through delivery, installation, and commissioning, working with vendors and in-house shops in a rapid-turn laboratory setting
  • Maintain rigorous revision control and configuration management in PDM/PLM systems: part numbering, BOMs, ECOs, and CAD library maintenance
  • Mentor early-career engineers and contribute to the technical development of the broader team
  • Perform other duties as assigned

What You Bring
  • Bachelor's degree in mechanical engineering or related field; advanced degree a plus
  • Strong first-principles engineering instincts and problem-solving skills
  • 5+ years' experience in mechanical design for vacuum-compatible instrumentation, ideally with radiation or high-energy diagnostics
  • Expert proficiency in a professional 3D CAD platform (Creo, NX, or SolidWorks), GD&T, and producing detailed manufacturing drawings
  • Significant experience with FEA tools (ANSYS, COMSOL) for structural and thermal analysis
  • Demonstrated ability to navigate competing design constraints simultaneously: vacuum compatibility, radiation tolerance, thermal management, and tight geometric envelopes internally and between neighboring subsystems
  • Proven ability to operate as an effective individual contributor: self-directed and accountable for assigned deliverables end-to-end
  • Comfortable driving cross-functional stakeholders - vendors, technicians, and peer engineers - to keep mechanical deliverables on schedule
  • Excellent verbal and written communication skills for technical documentation and cross-functional collaboration
  • Able to work closely with team members and project manager in fast-paced environment with ambitious deadlines

Bonus Points
  • Experience in fusion, plasma physics, accelerator physics, defense, or other high-consequence technical environments.
  • Familiarity with vacuum systems, cryogenics, high-voltage hardware, or pulsed power components.
  • Exposure to large-scale structural systems, pressure vessels, or custom capital equipment.

Pay Range:
$138,100-$263,800 USD
Total Compensation & Benefits for Eligible Employees
  • Industry-competitive salary
  • Equity plan
  • 6% employer 401k matching
  • Generous paid time off (including sick leave, vacation, paid family leave)
  • Medical, Dental, and Vision insurance

Actual base salary offered will be determined by: experience, skills, and work location. This range is for base salary, our total compensation includes equity and benefits. We welcome you to apply even if your expectations are outside our listed range.
Pacific Fusion is committed to creating a diverse environment and is proud to be an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.
Pacific Fusion is committed to providing reasonable accommodations for qualified individuals with disabilities in our job application procedures and throughout employment. If you need assistance or any accommodation, please let us know.
Pacific Fusion does not accept unsolicited resumes from recruiters or employment agencies without a fully executed recruitment agreement in place. In the absence of such agreement, Pacific Fusion reserves the right to pursue and hire any candidates without an obligation to pay fees. Agencies are requested not to contact Pacific Fusion hiring managers or employees regarding recruiting services.

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