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18 junior engineer jobs found

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Energy & Materials junior engineer California
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KP
Dec 25, 2025
Full time
Senior Engineer, Reactor Vessel Auxiliary Systems
Kairos Power Alameda, CA, USA
Company Overview Kairos Power is a new nuclear energy technology and engineering company whose mission is to enable the world's transition to clean energy, with the ultimate goal to dramatically improve people's quality of life while protecting the environment. This goal will be accomplished through the commercialization of the fluoride-salt-cooled, high-temperature reactor (FHR) that can be deployed with robust safety, affordable costs, and flexible operation to accommodate the expansion of variable renewables. Job Summary The Reactor Vessel Auxiliary Systems team is seeking a highly motivated Senior Engineer to join the growing Reactor Systems department where you will have the opportunity to work directly on the design, integration, and assembly of the structures, systems, and components (SSCs) within the reactor cavity in a first-of-a-kind FHR. In this role, you will manage and coordinate the detailed layout of reactor cavity components including routing of fuel, salt,...
KP
Dec 19, 2025
Full time
Senior Civil Structural Engineer
Kairos Power Alameda, CA, USA
Company Overview Kairos Power is a new nuclear energy technology and engineering company whose mission is to enable the world's transition to clean energy, with the ultimate goal to dramatically improve people's quality of life while protecting the environment. This goal will be accomplished through the commercialization of the fluoride-salt-cooled, high-temperature reactor (FHR) that can be deployed with robust safety, affordable costs, and flexible operation to accommodate the expansion of variable renewables. Job Summary Kairos Power is seeking a Senior Civil Structural Engineer to support the structural design of the reactor building for its Generation IV Nuclear Power Plant, including scaled prototypes and test facilities. As part of the Design Phase Interface Team, this role ensures seamless coordination of structural design across disciplines through technical guidance, clash resolution, stakeholder collaboration, and advanced structural analysis. The ideal candidate...
Qc
Dec 09, 2025
Full time
Senior HV Engineer - Level 4
$165,000 - $190,000 yearly
Qcells Irvine, CA, USA
Description Title: Senior HV Engineer - Level 4 Department: Engineering Center Location: Irvine, CA Supervisor: Director of SME FLSA Status: Exempt Position Status: Permanent, Full -Time Work Status (Remote/Hybrid/In-Office): Remote SENIOR HV ENGINEER - LEVEL 4 Hanwha Qcells USA Corp (Qcells USA), headquartered in Irvine, CA, specializes in providing utility-scale modules, solar photovoltaic (PV), and battery energy storage systems (BESS) project development, along with Engineering, Procurement, and Construction (EPC) services for solar and BESS projects nationwide. Qcells USA delivers comprehensive turnkey solutions encompassing the entire utility-scale project lifecycle. By choosing Qcells USA for turnkey solutions, customers can reduce uncertainty and risk, leading to enhanced investment returns and contributing to a more sustainable future. Qcells USA's complete turnkey solutions seamlessly integrate the expertise of our Module, Development, and EPC...
Qc
Oct 25, 2025
Full time
Senior Civil Engineer - Level 4
Qcells Irvine, CA, USA
Description Title: Senior Civil Engineer Level 4 Department: Engineering Center Location: Irvine, CA Supervisor: Manager of Civil / Structural Engineering FLSA Status: Exempt Position Status: Permanent, Full -Time Work Status (Remote/Hybrid/In-Office): Remote SENIOR CIVIL ENGINEER LEVEL 4 Hanwha Qcells USA Corp ( Qcells USA), headquartered in Irvine, CA, specializes in providing utility-scale modules, solar photovoltaic (PV), and battery energy storage systems (BESS) project development, along with Engineering, Procurement, and Construction (EPC) services for solar and BESS projects nationwide. Qcells USA delivers comprehensive turnkey solutions encompassing the entire utility-scale project lifecycle. By choosing Qcells USA for turnkey solutions, customers can reduce uncertainty and risk, leading to enhanced investment returns and contributing to a more sustainable future. Qcells USA's complete turnkey solutions seamlessly integrate the expertise of our...
KP
Aug 25, 2025
Full time
Senior Engineer, Instrumentation & Controls Test
Kairos Power Alameda, CA, USA
Company Overview Kairos Power is a new nuclear energy technology and engineering company whose mission is to enable the world's transition to clean energy, with the ultimate goal to dramatically improve people's quality of life while protecting the environment. This goal will be accomplished through the commercialization of the fluoride-salt-cooled, high-temperature reactor (FHR) that can be deployed with robust safety, affordable costs, and flexible operation to accommodate the expansion of variable renewables. Job Summary Kairos Power is seeking a Senior Engineer specializing in Instrumentation and Controls (I&C) to lead development and deployment of automation and control systems for R&D test platforms. This individual will be a subject matter expert in I&C design, test execution, and modeling across high-complexity systems supporting KP-FHR development. This role demands deep expertise in I&C engineering, a proven track record of success in complex...
GF
Jan 09, 2026
Full time
Principal Civil / Structural Engineer
$140,000 - $180,000 yearly
Gannett Fleming, Inc. Roseville, CA, USA
GFT is seeking a talented Principal Civil / Structural Engineer to join our team in our Roseville, CA. This role follows a hybrid work model, requiring regular attendance at our Roseville office. Our specialists have the in-depth knowledge to excel on the most challenging geotechnical assignments. We provide innovative solutions for foundations; underground construction; earth structures, including dams and levees; groundwater resources; and marginal building sites. Our geotechnical engineers and geologists also specialize in landslides, sinkholes, mine subsidence, seepage, expansive soils, and seismic activity. We have completed more than 1,000 subsurface and geophysical projects across the U.S. - from small-scale projects to large, complex dams, highways, bridges, and underground structures. What you'll be challenged to do: In this role, you will support critical infrastructure design and construction across the California foothills and mountains. Our projects include...
Qc
Dec 11, 2025
Full time
Electrical Engineer - Level 3
$135,000 - $150,000 yearly
Qcells Irvine, CA, USA
Description Title: Electrical Engineer Level 3 Department: Engineering Location: Irvine, CA Supervisor: Manager of Electrical Engineering FLSA Status: Exempt Position Status: Permanent, Full-Time Work Status: Hybrid ELECTRICAL ENGINEER LEVEL 3 Hanwha Qcells USA Corp ( Qcells USA), headquartered in Irvine, CA, specializes in providing utility-scale modules, solar photovoltaic (PV), and battery energy storage systems (BESS) project development, along with Engineering, Procurement, and Construction (EPC) services for solar and BESS projects nationwide. Qcells USA delivers comprehensive turnkey solutions encompassing the entire utility-scale project lifecycle. By choosing Qcells USA for turnkey solutions, customers can reduce uncertainty and risk, leading to enhanced investment returns and contributing to a more sustainable future. Qcells USA's complete turnkey solutions seamlessly integrate the expertise of our Module, Development, and EPC teams, while ensuring...
QS
Nov 09, 2025
Full time
Lead Cell Integration and Pack Engineer
QuantumScape Corporation CA, USA
QuantumScape is on a mission to transform energy storage with solid-state lithium-metal battery technology. The company's next-generation batteries are designed to enable greater energy density, faster charging and enhanced safety to support the transition away from legacy energy sources toward a lower carbon future. Job Title: Lead Cell Integration and Pack Engineer (Director) Report To: Consulting Member of Technical Staff or Senior Director Location : Onsite About QS: QuantumScape (NYSE: QS) is on a mission to revolutionize energy storage to enable a sustainable future. The company's next-generation solid-state lithium-metal battery technology is designed to enable greater energy density, faster charging and enhanced safety to support the transition away from legacy energy sources toward a lower carbon future. About the team : The Battery Systems Development team builds and tests systems powered by QS cells. We're a diverse, hands-on group of engineers who value...
GM
Sep 26, 2025
Full time
Structural Design Engineer (SE)
$90,000 - $175,000 yearly
General Matter Los Angeles, CA, USA
About the Company General Matter is enriching uranium in America. Our mission is to restore our country's ability to make nuclear fuel. Our fuel will help power AI, manufacturing, and other critical industries. It will power our next generation of reactors. Ultimately, it will power our national ambitions. We were incubated by Founders Fund, like Anduril and Palantir before us, and we are backed by top tier investors. Our lean, world-class team of engineers and operators is applying a first-principles approach to solving the problem of nuclear fuel production. We are a mission-driven company with a culture of urgency, accountability and transparency. About This Role As a Structural Design Engineer, you will play a pivotal role in executing a state-of-the-art enrichment facility from concept through commissioning. You will design, analyze, and ensure designs meet regulatory requirements for safety, performance, and compliance. You will have the opportunity to work on a...
Ra
Dec 15, 2025
Full time
Senior Mechanical Engineer (Structures)
Radiant El Segundo, CA, USA
Radiant is an El Segundo, CA-based startup building the world's first mass-produced, portable nuclear microreactors. The company's first reactor, Kaleidos, is a 1-megawatt failsafe microreactor that can be transported anywhere power is needed and run for up to five years without the need to refuel. Portable nuclear power with rapid deploy capability can replace similar-sized diesel generators, and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant's unique, practical approach to nuclear development utilizes modern software engineering to rapidly achieve safe, factory-built microreactors that leverage existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor next year at the Idaho National Laboratory, with initial customer deliveries beginning in 2028. Senior Mechanical Engineer (Structures) Radiant is seeking a highly motivated Senior Mechanical Engineer to design and develop critical...
Ra
Dec 15, 2025
Full time
Senior Structural Engineer
Radiant El Segundo, CA, USA
Radiant is an El Segundo, CA-based startup building the world's first mass-produced, portable nuclear microreactors. The company's first reactor, Kaleidos, is a 1-megawatt failsafe microreactor that can be transported anywhere power is needed and run for up to five years without the need to refuel. Portable nuclear power with rapid deploy capability can replace similar-sized diesel generators, and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant's unique, practical approach to nuclear development utilizes modern software engineering to rapidly achieve safe, factory-built microreactors that leverage existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor next year at the Idaho National Laboratory, with initial customer deliveries beginning in 2028. Senior Structural Engineer Radiant is seeking a highly motivated Senior Structural Engineer to design and develop critical structures...
Ra
Dec 15, 2025
Full time
Senior Mechanical Engineer (Sheet Metal Structures)
Radiant El Segundo, CA, USA
Radiant is an El Segundo, CA-based startup building the world's first mass-produced, portable nuclear microreactors. The company's first reactor, Kaleidos, is a 1-megawatt failsafe microreactor that can be transported anywhere power is needed and run for up to five years without the need to refuel. Portable nuclear power with rapid deploy capability can replace similar-sized diesel generators, and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant's unique, practical approach to nuclear development utilizes modern software engineering to rapidly achieve safe, factory-built microreactors that leverage existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor next year at the Idaho National Laboratory, with initial customer deliveries beginning in 2028. Senior Mechanical Engineer (Sheet Metal Structures) Radiant is seeking a highly motivated Senior Mechanical Engineer to design and develop...
ER
Dec 05, 2025
Full time
Senior Manufacturing Engineer, Tooling
Energy Recovery San Leandro, CA, USA
Join Energy Recovery and Help Build a Sustainable Future At Energy Recovery, we build products that help limit global temperature rise, reduce carbon emissions, provide safe drinking water for millions of people, and bring efficiency and sustainability to a range of industries. Our products help customers avoid approximately 19.7 million metric tons of carbon emissions per year -- equivalent to removing over 4.7million cars from the road! In addition to innovating world-class products that help our customers and the environment, our employees enjoy a diverse, collaborative work culture, as well as extensive company benefits that support the overall wellbeing of our staff. This includes everything from generous health plans and time off, paid family leave, subsidized lunches and company events, and opportunities for charitable giving and volunteering in the community. What You Can Look Forward To: Energy Recovery, Inc. is seeking a qualified candidate for an immediate...
Ra
Nov 13, 2025
Full time
Senior Structures Engineer
Radiant El Segundo, CA, USA
Radiant is an El Segundo, CA-based startup building the world's first mass-produced, portable nuclear microreactors. The company's first reactor, Kaleidos, is a 1-megawatt failsafe microreactor that can be transported anywhere power is needed and run for up to five years without the need to refuel. Portable nuclear power with rapid deploy capability can replace similar-sized diesel generators, and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant's unique, practical approach to nuclear development utilizes modern software engineering to rapidly achieve safe, factory-built microreactors that leverage existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor next year at the Idaho National Laboratory, with initial customer deliveries beginning in 2028. Senior Structures Engineer Radiant is seeking a highly motivated Senior Structures Engineer to design and develop critical structures...
Ra
Nov 13, 2025
Full time
Senior Mechanisms Engineer
Radiant El Segundo, CA, USA
Radiant is an El Segundo, CA-based startup building the world's first mass-produced, portable nuclear microreactors. The company's first reactor, Kaleidos, is a 1-megawatt failsafe microreactor that can be transported anywhere power is needed and run for up to five years without the need to refuel. Portable nuclear power with rapid deploy capability can replace similar-sized diesel generators, and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant's unique, practical approach to nuclear development utilizes modern software engineering to rapidly achieve safe, factory-built microreactors that leverage existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor next year at the Idaho National Laboratory, with initial customer deliveries beginning in 2028. Senior Mechanisms Engineer Radiant is seeking a highly motivated Senior Mechanisms Engineer to design and develop critical mechanisms...
CF
Oct 24, 2025
Full time
Senior Mechanical Engineer
Commonwealth Fusion Systems Milpitas, CA, USA
About Commonwealth Fusion Systems: Commonwealth Fusion Systems is on a mission to deliver the urgent transition to fusion energy. Combining decades of research, top talent, and new technologies, we're designing and building commercially viable fusion power plants. And working with policymakers and suppliers to build the energy industry of the future. We're in the best position to make it happen. Since 2018, we've raised nearly $3 billion in capital, making us the largest and leading private fusion company in the world. Now we're looking for more thinkers, doers, builders, and makers to join us. People who'll bring new perspectives, solve tough problems, and thrive as part of a team. If that's you and this role fits, we want to hear from you. Join the power movement as a Senior Mechanical Engineer We're looking for a Senior Mechanical Engineer to join our R&D and equipment design team to help build the next generation of thin-film deposition technology. The Senior...
Qc
Jan 09, 2026
Full time
Civil Engineer - Level 2
Qcells Irvine, CA, USA
Description Title: Civil Engineer - Level 2 Department: Engineering Center Location: Irvine, CA Super visor: Manager of Civil / Structural Engineering FLSA Status: Exempt Position Status: Permanent, Full -Time Work Status (Remote/Hybrid/In-Office): Remote CIVIL ENGINEER - LEVEL 2 Hanwha Qcells USA Corp (Qcells USA), headquartered in Irvine, CA, specializes in providing utility-scale modules, solar photovoltaic (PV), and battery energy storage systems (BESS) project development, along with Engineering, Procurement, and Construction (EPC) services for solar and BESS projects nationwide. Qcells USA delivers comprehensive turnkey solutions encompassing the entire utility-scale project lifecycle. By choosing Qcells USA for turnkey solutions, customers can reduce uncertainty and risk, leading to enhanced investment returns and contributing to a more sustainable future. Qcells USA's complete turnkey solutions seamlessly integrate the expertise of our Development,...
BE
Dec 11, 2025
Full time
Principal Electrical Engineer
Bloom Energy San Jose, CA, USA
At Bloom Energy, our vision for a world powered by clean, reliable, and affordable energy is more than just a dream-we're making it reality. For over two decades, we've been at the forefront of the global energy transition, pioneering solutions that empower critical industries to thrive in a rapidly digitizing, energy-intensive world. From revolutionizing power for AI-driven data centers to ensuring resilience for hospitals, electric grids, manufacturing facilities, and utilities, our solid oxide fuel cell (SOFC) and solid oxide electrolyzer (SOEC) technologies are redefining what's possible by delivering energy abundance for all. With more than 30,000 fuel cell modules deployed worldwide, we are the trusted partner for Fortune 100 companies and innovators alike. Our cutting-edge solutions enable unparalleled "time-to-power" capabilities, reliability, and sustainability, ensuring our customers remain ahead in a world where soaring energy demand and intensifying energy scarcity are...
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