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Senior Reactor Physics Jobs (NOW HIRING)

Last Energy

Reactor Operator

Bryan, TX

Strong working knowledge of reactor physics, thermal hydraulics, and plant systems as applied to ... NRC Reactor Operator (RO) or Senior Reactor Operator (SRO) license, or equivalent certification (e ...

Last Energy

Reactor Operator

Bryan, TX

Strong working knowledge of reactor physics, thermal hydraulics, and plant systems as applied to ... NRC Reactor Operator (RO) or Senior Reactor Operator (SRO) license, or equivalent certification (e ...

Last Energy

Reactor Operator

Bryan, TX · On-site

Strong working knowledge of reactor physics, thermal hydraulics, and plant systems as applied to ... NRC Reactor Operator (RO) or Senior Reactor Operator (SRO) license, or equivalent certification (e ...

Radiant

Senior Nuclear Engineer

El Segundo, CA · On-site

$133K - $184K/yr

About the Role Radiant is seeking a driven Senior Nuclear Engineer to join our team ... You will own modeling methods and reactor physics calculations of neutronics parameters such as ...

Radiant

Senior Nuclear Engineer

El Segundo, CA · On-site

$111K - $152K/yr

About the Role Radiant is seeking a driven Senior Nuclear Engineer to join our team ... You will own modeling methods and reactor physics calculations of neutronics parameters such as ...

Last Energy

Senior Nuclear Engineer

Austin, TX · On-site

$103K - $142K/yr

We are seeking a Senior Nuclear Engineer to join our core engineering team and drive the analytical ... or reactor physics * Proficiency with at least two of the following codes: TRACE, MELCOR, MCNP ...

Last Energy

Senior Nuclear Engineer

Austin, TX

$103K - $142K/yr

We are seeking a Senior Nuclear Engineer to join our core engineering team and drive the analytical ... or reactor physics * Proficiency with at least two of the following codes: TRACE, MELCOR, MCNP ...

Last Energy

Senior Nuclear Engineer

Austin, TX · On-site

$103K - $142K/yr

We are seeking a Senior Nuclear Engineer to join our core engineering team and drive the analytical ... or reactor physics * Proficiency with at least two of the following codes: TRACE, MELCOR, MCNP ...

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Senior Reactor Physics information

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$25K

$80.3K

$163.5K

How much do senior reactor physics jobs pay per year?

As of Aug 18, 2026, the average yearly pay for senior reactor physics in the United States is $80,287.00, according to ZipRecruiter salary data. Most workers in this role earn between $41,500.00 and $103,000.00 per year, depending on experience, location, and employer.

What is the difference between Senior Reactor Physics vs Reactor Physics Engineer?

AspectSenior Reactor PhysicsReactor Physics Engineer
Required CredentialsBachelor's or Master's in Nuclear Engineering, often with experienceBachelor's or Master's in Nuclear Engineering or related field
Work EnvironmentResearch facilities, nuclear power plants, government labsDesign, analysis, and testing in nuclear facilities or research centers
Employer & Industry UsageUtilities, government agencies, research institutionsNuclear power plants, engineering firms, research labs

Both roles involve nuclear reactor analysis, but Senior Reactor Physics typically requires more experience and leadership responsibilities, focusing on oversight and complex analysis. Reactor Physics Engineers often focus on design, modeling, and technical analysis under supervision. The senior role emphasizes project management and strategic planning, while the engineer role is more technical and hands-on.

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Senior Reactor Physics jobs near you
Infographic showing various Senior Reactor Physics job openings in the United States as of August 2026, with employment types broken down into 1% As Needed, 74% Full Time, 24% Part Time, and 1% Contract. Highlights an 76% Physical, 2% Hybrid, and 22% Remote job distribution, with an average salary of $80,287 per year, or $38.6 per hour.

Reactor Operator

Last Energy

Bryan, TX

Full-time

Re-posted 13 days ago

Job description

Last Energy is seeking an experienced Reactor Operator to support the commissioning, startup, and safe operation of our PWR-5 test reactor. This is a ground-floor opportunity to help establish the operational foundation for a fleet of reactors that will be deployed globally at scale. You will work hands-on with a multidisciplinary team of nuclear engineers, I&C specialists, and plant staff to execute reactor operations safely, reliably, and in compliance with all applicable regulatory requirements.
Key Duties & Responsibilities
  • Monitor, operate, and control reactor systems during startup, operation, and shutdown in accordance with approved procedures and technical specifications
  • Execute fueling operations, including fuel handling, loading, core management activities, and associated radiological controls
  • Perform and document routine surveillances, plant walkdowns, and equipment checks to ensure systems remain within operational limits
  • Respond to abnormal and emergency plant conditions; execute abnormal operating procedures (AOPs) and emergency operating procedures (EOPs) as required
  • Support the development, review, and validation of plant operating procedures, especially as the PWR-5 design matures toward commercial deployment
  • Maintain rigorous configuration control and documentation standards consistent with nuclear quality assurance requirements
  • Participate in training, simulator exercises, and qualification programs; support the training of junior operators as applicable
  • Interface with regulatory authorities and support inspections, audits, and licensing activities as needed
  • Other duties as assigned
Qualifications
  • 2+ years of hands-on reactor operations experience, with demonstrated proficiency in licensed or certified operator duties
  • Experience with pressurized water reactor (PWR) or pool-type reactor operations; BWR experience will also be considered
  • Direct experience supporting fueling operations, including fuel handling and associated radiological and criticality safety controls
  • Strong working knowledge of reactor physics, thermal hydraulics, and plant systems as applied to day-to-day operations
  • Familiarity with nuclear QA programs, technical specifications, and the regulatory framework governing nuclear plant operations (NRC or equivalent)
  • NRC Reactor Operator (RO) or Senior Reactor Operator (SRO) license, or equivalent certification (e.g., DOE-facility certification, international equivalent) is preferred
  • Experience with small modular reactors (SMRs), research reactors, or naval reactors is preferred
  • Familiarity with startup and commissioning activities for new reactor facilities is preferred
  • Experience supporting regulatory inspections or participating in licensing submittals is preferred
  • Ability to work effectively in a lean, fast-paced startup environment with a "builder" mindset
  • Proven ability to execute procedures with a rigorous, questioning attitude and high attention to detail
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