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Nuclear Systems Engineer Jobs in California (NOW HIRING)

Our mission spans four critical national security areas nuclear deterrence, threat preparedness ... This position is in the Laser Systems Engineering and Operations (LSEO) Division, within the ...

Our mission spans four critical national security areas nuclear deterrence, threat preparedness ... We have multiple openings for Spacecraft Systems Engineers to provide spacecraft subject matter ...

Our mission spans four critical national security areas nuclear deterrence, threat preparedness ... We have multiple openings for Spacecraft Systems Engineers to provide spacecraft subject matter ...

STE is the United States' premier provider of radiation detectors for nuclear search, in support of ... These systems will be delivered to STE's customers, forming a key element of their operational ...

STE is the United States' premier provider of radiation detectors for nuclear search, in support of ... These systems will be delivered to STE's customers, forming a key element of their operational ...

STE is the United States' premier provider of radiation detectors for nuclear search, in support of ... These systems will be delivered to STE's customers, forming a key element of their operational ...

Senior Process Engineer

Torrance, CA ยท On-site

$108K - $140K/yr

Our first pilot plant in Orangeville, Utah will demonstrate how advanced nuclear systems and fuel ... This engineer will own process system architecture from early concept and design through ...

Senior Process Engineer

Torrance, CA

$108K - $140K/yr

Our first pilot plant in Orangeville, Utah will demonstrate how advanced nuclear systems and fuel ... This engineer will own process system architecture from early concept and design through ...

Showing results 41-60

Nuclear Systems Engineer information

See California salary details

$25.7K

$104.2K

$148K

How much do nuclear systems engineer jobs pay per year?

As of Aug 8, 2026, the average yearly pay for nuclear systems engineer in California is $104,212.00, according to ZipRecruiter salary data. Most workers in this role earn between $97,200.00 and $116,500.00 per year, depending on experience, location, and employer.

What does a nuclear systems engineer do?

A Nuclear Systems Engineer is responsible for designing, developing, operating, and maintaining nuclear systems and equipment, such as reactors, power plants, and nuclear fuel cycles. They ensure that these systems operate safely, efficiently, and within regulatory standards. Their work often involves analyzing system performance, troubleshooting issues, implementing safety protocols, and working closely with other engineers and regulatory agencies. Nuclear Systems Engineers play a critical role in both energy production and the safe management of nuclear materials.

What is the difference between Nuclear Systems Engineer vs Nuclear Reactor Operator?

AspectNuclear Systems EngineerNuclear Reactor Operator
CredentialsEngineering degree, certifications in nuclear engineeringReactor operator license, training certifications
Work EnvironmentDesign, develop, and maintain nuclear systems in labs or plantsOperate and monitor nuclear reactors in power plants
Industry UsageUsed in engineering firms, research facilities, and power plantsPrimarily employed in nuclear power plants

While both roles work within the nuclear industry, Nuclear Systems Engineers focus on designing and maintaining nuclear systems, whereas Nuclear Reactor Operators are responsible for the day-to-day operation and safety of nuclear reactors. Their credentials, work environments, and industry applications differ, but both are essential for nuclear plant safety and efficiency.

What are the key skills and qualifications needed to thrive as a nuclear systems engineer, and why are they important?

To thrive as a Nuclear Systems Engineer, you need a strong background in nuclear engineering principles, physics, and mathematics, typically supported by a relevant engineering degree. Familiarity with industry-standard simulation software, safety analysis tools, and certifications like Fundamentals of Engineering (FE) or Professional Engineer (PE) are often required. Exceptional problem-solving, attention to detail, and strong communication skills help you effectively collaborate with multidisciplinary teams and ensure regulatory compliance. These skills and qualifications are crucial for maintaining safety, efficiency, and reliability in complex nuclear systems.

What are some common collaboration points between nuclear systems engineers and other departments within a nuclear facility?

Nuclear Systems Engineers frequently work alongside operations, maintenance, and safety teams to ensure the reliable and safe performance of nuclear systems. They often collaborate with reactor operators to troubleshoot system anomalies, coordinate with safety analysts to verify compliance with regulations, and work with maintenance staff during planned outages or upgrades. This cross-functional teamwork is essential for optimizing plant performance, addressing technical challenges, and ensuring all systems adhere to strict safety standards. Strong communication and documentation skills are therefore highly valued in this role.
What job categories do people searching Nuclear Systems Engineer jobs in California look for? The top searched job categories for Nuclear Systems Engineer jobs in California are:
Infographic showing various Nuclear Systems Engineer job openings in California as of August 2026, with employment types broken down into 85% Full Time, 9% Part Time, 5% Contract, and 1% Nights. Highlights an 89% Physical, 3% Hybrid, and 8% Remote job distribution, with an average salary of $104,212 per year, or $50.1 per hour.

Control Systems Engineer

LLNL

Livermore, CA โ€ข On-site

Full-time

Retirement

Re-posted 7 days ago


Job description

Company Description

Join us and make YOUR mark on the World!

Lawrence Livermore National Laboratory (LLNL) has turned bold ideas into world-changing impact advancing science and technology to strengthen U.S. security and promote global stability.ย 

Our mission spans four critical national security areas nuclear deterrence, threat preparedness, energy security, and multi-domain defense empowering teams to take on the toughest challenges of today and tomorrow. With a culture built on innovation and operational excellence, LLNL is a place where your expertise can make a real impact.

Job Description

We have multiple openings for Control Systems Engineers. You will provide engineering solutions for developing, implementing, and maintaining control systems in the National Ignition Facility (NIF), the world's highest-energy pulsed laser system responsible for the recent LLNL fusion breakthrough. With over 60,000 control points distributed throughout the facility, many of NIF's subsystems have control technologies at their core. You will contribute to the engineering design and development of new control systems and system upgrades to continually improve system performance and reliability. This position is in the Laser Systems Engineering and Operations (LSEO) Division, within the Engineering Directorate.

This position requires full-time on-site presence due to the nature of the work.

This position will be filled at eitherย level based on knowledge and related experience as assessed by the hiring team. Additional job responsibilities (outlined below) will be assigned if hired at the higher level.

In this role, you will

  • Work under limited direction with moderate responsibility, use comprehensive knowledge, and exercise independent judgment to determine methods and recommend improvements within established frameworks and contribute to the fulfillment of project and organizational goals.
  • Provide hardware and software solutions to problems of moderate complexity involving, design, documentation, deployment, and maintenance of NIF&PS's control systems. This may include utility systems, safety systems, machine protection systems, laser alignment and diagnostics systems, and optics processing systems.
  • Collaborate with scientists, engineers, technicians, designers, and operations teams for the development of control systems. ย 
  • Provide technical input on control system requirements and designs through formal and informal design reviews, in collaboration with project leaders and team.
  • Contribute to software and hardware design, implementation, and deployment following strict configuration management processes.
  • Provide solutions and propose improvements to control system architectures, processes, and frameworks.
  • Collaborate with system managers and/or software testers to develop and execute commissioning test procedures.
  • Support the NIF&PS operations teams by troubleshooting facility issues, finding root causes of problems, and supporting planned work that impacts moderately complex control systems.
  • Participate in the reactive maintenance on-call rotation, as needed.
  • Perform other duties as assigned.

Additional job responsibilities, at the SES.3 level

  • Function independently with minimal direction, taking significant responsibility and using advanced knowledge and judgment to establish objectives, prioritize parallel tasks, allocate resources, and collaborate in the development of innovative methods/technology to guide the completion of projects and contribute to the development of organizational goals.
  • Provide control system solutions to complex problems by applying in-depth analysis and independent judgment to identify root causes and deliver reliable outcomes.
  • Utilize advanced technical knowledge to support complex troubleshooting efforts by analyzing system behavior, diagnosing root causes, evaluating corrective actions, and collaborating with cross-functional teams to resolve issues efficiently while maintaining system reliability and performance.
  • Conduct Failure Modes and Effects Analysis research and perform in-depth analysis to identify potential system vulnerabilities and advance the architecture of the control systems through informed design improvements.
  • Mentor junior staff and provide oversight and guidance into production and commissioning activities on subsystems to ensure work is performed accurately, efficiently, and in alignment with project requirements, quality standards, and operational objectives.
  • May lead project teams in the development and deployment of control solutions.
Qualifications
  • Ability to secure and maintain a U.S. DOE Q-level security clearance which requires U.S. citizenship.
  • Bachelor's degree in Electrical Engineering, Computer Science, Engineering discipline related to control systems, or a related technical field, or the equivalent combination of education and related experience.
  • Comprehensive knowledge and broad experience in developing hardware or software solutions for control systems in industrial or research environments, with a focus on supporting project execution to meet stakeholder needs.
  • Comprehensive knowledge and broad experience in one or more of the following areas:
    • Hardware and/or software development for data acquisition and control systems.
    • Hardware design and selection of analog and digital instrumentation such as sensors, actuators, and controllers to meet system requirements.
    • Custom circuit design for unique control system applications.
    • Application, use, and programming of programmable logic controllers (PLCs).
    • Software development for basic signal conditioning or processing in data acquisition or calibration scenarios.
    • Software development of automation sequences and state machines.
    • Design, development and management of Supervisory Control and Data Acquisition (SCADA) systems and Human Machine Interfaces (HMI). ย 
    • Development and support of standalone test and research control systems applications in graphical programming language, i.e. LabView.
  • Comprehensive understanding and broad experience in the application of documentation standards, including drawings, procedures, statements of work, and test plans.
  • Broad experience using standard electronic measurement and diagnostic tools, such as oscilloscopes and TDRs, to support testing and troubleshooting activities.
  • Broad experience supporting control systems throughout the full engineering lifecycle, including design, assembly, integration, testing, and maintenance.
  • Proficient verbal and written communication skills to effectively communicate technical information and enable close collaboration with project team members, control systems leadership, and other project stakeholders across the organization.
  • Experience working as a member of a multidisciplinary project team, including collaboration with scientists, engineers, technicians, and designers.

Additional qualifications at the SES.3 level

  • Advanced experience developing complex software or hardware solutions for control system automation in collaboration with stakeholders to meet project needs.
  • Significant experience developing following configuration management processes to design and develop control system requirements, design documents, test plans, and prepare user documentation.
  • Advanced verbal and written communicationย skills with the ability to effectively prepare, present, and explain technical information, provide advice to senior management and external stakeholders, and collaborate with technical staff, managers, stakeholders, and vendors at all organizational levels.
  • Demonstrated ability to effectively lead independent work and collaborate in a multidisciplinary environment with scientists, engineers, technicians, and designers.
  • Significant experience troubleshooting complex control systems problems in an operations environment and finding root causes of problems.
  • Experience mentoring team members.

Qualifications We Desire

  • Master's degree in Electrical Engineering, Computer Science, or related technical field.
  • Experience in industrial production environments (e.g. food & beverage, automotive, electronics, pharmaceuticals).
  • Experience in the modernization of legacy control systems.
  • Experience and understanding of Failure Modes and Effects Analysis.
  • Understanding of Systems Engineering concepts.ย ย 

Pay Range:

$146,340 - $222,564 Annually

$146,340 - $185,544 Annually for the SES.2 level

$175,530 - $222,564 Annually for the SES.3 level

This is the lowest to highest salary we in good faith believe we would pay for this role at the time of this posting; pay will not be below any applicable local minimum wage.ย  An employee's position within the salary range will be based on several factors including, but not limited to, specific competencies, relevant education, qualifications, certifications, experience, skills, seniority, geographic location, performance, and business or organizational needs.

Additional Information

#LI-Onsite

Position Information

This is a Career Indefinite position, open to Lab employees and external candidates.

Why Lawrence Livermore National Laboratory?

  • Included in 2026ย Best Places to Work by Glassdoor!
  • Flexibleย Benefits Package
  • 401(k)
  • Relocation Assistance
  • Education Reimbursement Program
  • Flexible schedules (*depending on project needs)
  • Our values - visitย https://www.llnl.gov/inclusion/our-values

Security Clearance

This position requires a Department of Energy (DOE) Q-level clearance.ย ย If you are selected, weย will initiate a Federal background investigation to determine if youย meet eligibility requirements for access to classified information or matter. Also, all L or Q cleared employees are subject to random drug testing.ย  Q-level clearance requires U.S. citizenship.ย 

Pre-Employment Drug Test

External applicant(s) selected for this position must pass a post-offer, pre-employment drug test. This includes testing for use of marijuana as Federal Law applies to us as a Federal Contractor.

Wireless and Medical Devices

Per the Department of Energy (DOE), Lawrence Livermore National Laboratory must meet certain restrictions with the useย and/or possession ofย mobile devices in Limited Areas. Depending on your job duties, you may be required to work in a Limited Area whereย you are not permitted to have a personal and/or laboratory mobile deviceย in your possession.ย  This includes, but not limited to cell phones, tablets, fitness devices, wireless headphones, and other Bluetooth/wireless enabled devices.ย ย 

Ifย you useย aย medical device, whichย pairs with a mobile device,ย you must still follow the rules concerningย the mobile device in individual sections within Limited Areas.ย  Sensitive Compartmented Information Facilities requireย separate approval. Hearing aids without wireless capabilities or wireless that has been disabled are allowed in Limited Areas, Secure Space and Transit/Buffer Space within buildings.

How to identify fake job advertisements

Please be aware of recruitment scams where people or entities are misusing the name of Lawrence Livermore National Laboratory (LLNL) to post fake job advertisements. LLNL never extends an offer without a personal interview and will never charge a fee for joining our company. All current job openings are displayed on the Career Page under "Find Your Job" of our website. If you have encountered a job posting or have been approached with a job offer that you suspect may be fraudulent, we strongly recommend you do not respond.

To learn more about recruitment scams:ย https://www.llnl.gov/sites/www/files/2023-05/LLNL-Job-Fraud-Statement-Updated-4.26.23.pdf

Equal Employment Opportunity

We are an equal opportunity employer that is committed to providing all with a work environment free of discrimination and harassment. All qualified applicants will receive consideration for employment without regard to race, color, religion, marital status, national origin, ancestry, sex, sexual orientation, gender identity, disability, medical condition, pregnancy, protected veteran status, age, citizenship, or any other characteristic protected by applicable laws.

Reasonable Accommodation

Our goal is to create an accessible and inclusive experience for all candidates applying and interviewing at the Laboratory.ย  If you need a reasonable accommodation during the application or the recruiting process, please use our online form to submit a request.ย 

Californiaย Privacy Notice

The California Consumer Privacy Act (CCPA) grants privacy rights to all California residents. The law also entitlesย job applicants, employees, and non-employee workers to be notified of what personal information LLNL collects and for what purpose. The Employee Privacy Notice can be accessed here.