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18 thermal engineer jobs found

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HE
Mar 01, 2026
Full time
Senior Mechanical Engineer, Thermal
Helion Energy Everett, WA
About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone. Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). We are now operating Polaris, our next prototype on the path to the world's first fusion power plant. This is a pivotal time to join Helion. You will tackle real-world challenges with a team that prizes urgency, rigor, ownership, and a commitment to delivering hard truths - values essential to achieving what no one has before. Together, we will change the future of energy,...
KD
Apr 26, 2026
Full time
Manufacturing Engineer - August 2018
Keltia Design, Inc. Renton, WA
6 month Contract Keltia Design, Inc is a technical support services company supplying technical recruiting, training, and engineering design services to customers in the Aerospace industry on a permanent and contractual basis. Our client located south of Seattle, WA, is seeking a highly motivated Manufacturing Engineer contractor with 5-7+ yrs. experience: Statistical Analysis Problem Solving/Analysis Read and comprehend drawings and specifications Knowledge of Boeing and Airbus process and specifications Skilled in MSWord, Excel, PowerPoint, Project Epicor experience or equivalent ERP system Proficient in verbal and written communication skills Proficient in Catia V5, Inventor, Pro-e, Solid Works, or other 3-Dimensional CAD system. Familiar with Delmia Siemons or Inventor CFD or equivalent (Thermal Profile) Familiar with COMPRO Simulation Software (Spring Back Issues) Familiar with Fiber Sim Draping Software (Draping and Wrinkles) Understanding of AS9100D and NADCAP...
HA
Apr 20, 2026
Full time
UAS Composites Engineer
$75,000 - $150,000 yearly
Heven AeroTech Bingen, WA
Title: UAS Composites Engineer Company: Heven AeroTech Location: Bingen, Washington FLSA: Exempt About Our Company: At Heven AeroTech (Heven), we don't just believe in the power of people-we build our success on it. As a recognized leader in hydrogen-powered drones, we've earned recognition for creating a workplace where innovation thrives, collaboration is second nature, and every employee feels valued. Our culture is anchored in trust and a shared commitment to excellence. We believe great teams are built on individuals who are humble, hungry, and smart -those who put team success first, take initiative to continuously improve, and demonstrate strong interpersonal awareness. At Heven, your voice matters, your ideas are heard, and your contributions make a tangible impact as you grow through hands-on experience and collaboration across the team. Role Summary: We are seeking a highly skilled UAS Engineer with a focus on composite structures and payload integration to...
Si
Apr 09, 2026
Full time
Mechanical Engineer
Sila Moses Lake, WA
About Us We are Sila, a next-generation battery materials company. Our mission is to power the world's transition to clean energy. To create this future, our team is building a better lithium-ion battery from the inside out today. We engineer and manufacture ground-breaking battery materials that significantly increase the energy density of batteries, while reducing their size and weight. The result? Smaller more powerful batteries that can unlock innovation in consumer devices and accelerate the mass adoption of electric cars to eliminate our dependence on fossil fuels. We're tackling one of the biggest challenges of our time every day, and together we're redefining what's possible. Are you ready to be a part of a team committed to changing the world? Who You Are Sila's Manufacturing Engineering team in Moses Lake is seeking a highly motivated Mechanical Engineer to support the reliable operation, optimization, and continuous improvement of Sila's first-in-class Silicon...
AA
Apr 09, 2026
Full time
Manufacturing Engineer I
AIM Aerospace, Inc. Sumner, WA
Join us as we look to the future! We are currently accepting applications for a Manufacturing Engineer I at our Sumner location. SEKISUI Aerospace strives to provide an employee-friendly environment in which goal-oriented individuals thrive as they achieve even more demanding challenges. We are committed to Excellence, managing our company with Integrity, Dignity & Respect, Trust, Engagement in all that we do, and Passion to get the job done to the best of our abilities. Benefits Medical (free employee-only coverage and low-cost options available) Dental, Vision, Prescription Life and AD&D Insurance Company Sponsored 401k with Employer Match Employee Assistance Program Wellness Program Tuition Reimbursement Employee Discounts 8 Paid Holidays plus closed (with pay) for a week during the winter break 15 days per year accrued Vacation/Sick time. Accrued time is available for immediate use; prorated first year Schedule: 7 am - 3:30 pm, Monday - Friday Pay:...
ZP
Apr 08, 2026
Contractor
Mechanical Design Engineer (Contract)
$65.00 - $80.00 hourly
Zeno Power Seattle, WA
Company Overview: Zeno Power is the leading developer of nuclear batteries - compact power systems that provide reliable, clean energy in frontier environments. By harnessing the heat from radioisotopes, Zeno's batteries power critical missions on Earth, in space, and at sea. To bring this technology to market by 2027, Zeno is seeking out purpose-driven and innovative professionals who are comfortable working in a startup environment. Team members will have a direct impact in enabling commercial and national security missions from the depths of our oceans, to the surface of the moon, and in austere environments here on Earth. Zeno is proud to be an Equal Opportunity Employer and is committed to attracting, retaining, and developing a highly qualified, diverse, and dedicated work force. We do not discriminate in hiring on the basis of sex, gender identity, sexual orientation, race, color, religious creed, national origin, physical or mental disability, protected Veteran status,...
SP
Apr 08, 2026
Full time
Senior Mechanical Design Engineer
Simplexity Product Development Seattle, WA
Simplifying the Complex. Simplexity is a product development engineering firm, hired by leading technology companies to design their next generation products. In an industry of overly-complex design and production, we strive for simplicity, reducing product cost and improving reliability for our clients through our Product Development Process. Why join Simplexity Product Development? If you're an engineer who likes variety in your job, you'll fit right in here. Simplexity works across a breadth of projects - from robotics and IoT to medical devices, consumer wearables, automation and more. You won't be siloed into one tiny piece of the organization; you'll roll up your sleeves and help solve real, difficult problems for demanding clients who expect excellence. Our teams are tight, collaborative, and made up of folks who genuinely want to build something cool and delight our customers. Yet that doesn't mean grinding for 60-hours per week, week-over-week. We believe that...
FC
Mar 27, 2026
Contractor
Senior Mechanical Engineer
$75.00 - $85.00 hourly
Fresh Consulting Redmond, WA
Fresh Consulting is a design-led, software development and hardware engineering company, offering end-to-end digital services to help companies innovate. We bring together amazing UX designers, sophisticated developers, digital strategists, and top-notch engineers to help companies create fresh experiences that connect humans, systems, and machines. We've been growing fast and need someone to help us continue to manage the delivery of high-quality work in a fast-paced environment. See more at freshconsulting.com Visit freshconsulting.com/portfolio to see our project work across several industries. View and apply to all jobs - https://freshconsulting.applytojob.com/apply/ or visit freshconsulting.com/careers Title: Senior Mechanical Engineer Location: Onsite in Redmond, WA Benefits: Employee benefits at 100% including Medical, PTO, Holiday Pay, 401K Plan and much more! Hours: Minimum 40 Hours/Week Job Description Lead exploration, prototyping, maturing and implementation of...
Ae
Mar 27, 2026
Full time
Senior Spacecraft Engineer
Aetherflux Seattle, WA
Senior Spacecraft Engineer About Aetherflux Aetherflux is building the infrastructure to power and connect the orbital economy. Our satellites operate in Low Earth Orbit to collect sunlight and enable a new class of capabilities-from transmitting energy via infrared lasers (space-to-earth and space-to-space), to powering on-orbit compute, to delivering secure, high-bandwidth optical data. By rethinking how energy and data are generated and distributed in space, we're unlocking entirely new ways to operate both in orbit and on Earth. Founded in 2024 by Baiju Bhatt (co-founder of Robinhood), Aetherflux is backed by leading investors and built by a team from top aerospace and defense organizations. We're moving quickly to solve complex technical challenges and build a new category of space infrastructure. The Role We are looking for a Spacecraft Engineer to help design, build, and integrate the core systems that power our satellite platform. You will work across...
Ae
Mar 26, 2026
Full time
Sr. Mechanical Engineer
Aetherflux Seattle, WA
Senior Mechanical Engineer | Job Description About Aetherflux Aetherflux is building the infrastructure to power and connect the orbital economy. Our satellites operate in Low Earth Orbit to collect sunlight and enable a new class of capabilities-from transmitting energy via infrared lasers (space-to-earth and space-to-space), to powering on-orbit compute, to delivering secure, high-bandwidth optical data. By rethinking how energy and data are generated and distributed in space, we're unlocking entirely new ways to operate both in orbit and on Earth. Founded in 2024 by Baiju Bhatt (co-founder of Robinhood), Aetherflux is backed by leading investors and built by a team from top aerospace and defense organizations. We're moving quickly to solve complex technical challenges and build a new category of space infrastructure. The Role As a Senior Mechanical Engineer, you will play a key role in designing and building the physical systems that enable our spacecraft to...
Ae
Mar 26, 2026
Full time
Sr. Avionics Engineer
Aetherflux Seattle, WA
Senior Avionics Engineer (Seattle, WA) About Aetherflux Aetherflux is building the infrastructure to power and connect the orbital economy. Our satellites operate in Low Earth Orbit to collect sunlight and enable a new class of capabilities-from transmitting energy via infrared lasers (space-to-earth and space-to-space), to powering on-orbit compute, to delivering secure, high-bandwidth optical data. By rethinking how energy and data are generated and distributed in space, we're unlocking entirely new ways to operate both in orbit and on Earth. Founded in 2024 by Baiju Bhatt (co-founder of Robinhood), Aetherflux is backed by leading investors and built by a team from top aerospace and defense organizations. We're moving quickly to solve complex technical challenges and build a new category of space infrastructure. The Role The Avionics Engineer is responsible for the design, development, and integration of electrical systems supporting advanced optical and laser...
IC
Mar 19, 2026
Full time
Senior Mechanical Engineer
$125,000 - $250,000 yearly
Interlune Corporation Seattle, WA
Interlune is a space resources company based in Seattle, WA. We will provide resources from space to power a clean and sustainable economy on Earth and in space. We are looking for a Doer who wants to join our early-stage team and accelerate humanity's progress toward an off-world future. Our engineering team combines expert knowledge of geological sciences, mechanical engineering, automation, systems engineering, modeling and simulation, and advanced fabrication to build the infrastructure that will create an in-space economy. To join our small team, you must be agile, willing to learn, and able to take on multiple roles as needed. This role will report to the Vice President of Engineering and bring significant expertise in space robotics, particularly for planetary surface operations. Applicants from all industries are welcome, with particular emphasis in complex, multi-disciplinary system development. Responsibilities: Lead the design of high-reliability mechanisms,...
ZE
Mar 02, 2026
Full time
Mechanical Engineer
Zap Energy Everett, WA
Help us power the planet. The planet urgently needs safe, reliable, zero-carbon energy without waste. Nuclear fusion can address the scale of this problem, but for decades, existing fusion approaches have not proven a net positive energy gain. Zap Energy has rethought the fundamental technology of fusion. As the only company using sheared-flow-stabilized Z-pinch, we present potentially the fastest path to commercially available fusion energy. Zap Energy is currently looking for a Mechanical Engineer. This individual will have a key, hands-on role in the development of our fusion z-pinch devices. The ideal candidate is an organized, inventive problem solver, capable of working through technical challenges and employing sound, pragmatic solutions through team efforts. Applicants must be currently authorized to work in the United States for any employer. Responsibilities and Duties: • Engineer, document, procure, assemble and deploy from sub-assemblies to full shear-flow...
HE
Mar 01, 2026
Full time
Senior Mechanical Engineer, Diagnostics
Helion Energy Everett, WA
About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone. Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). We are now operating Polaris, our next prototype on the path to the world's first fusion power plant. This is a pivotal time to join Helion. You will tackle real-world challenges with a team that prizes urgency, rigor, ownership, and a commitment to delivering hard truths - values essential to achieving what no one has before. Together, we will change the future of energy,...
nL
Jan 24, 2026
Full time
Senior Mechanical Engineer - Defense
nLIGHT Camas, WA
Description Who We Are At nLIGHT, we are constantly on the cutting-edge of laser technology in a massively growing market. We are a leading provider of high-power semiconductors and fiber lasers for industrial, microfabrication, and aerospace & defense applications, to name a few. Our lasers are changing not only the way things are made, but also changing the things that can be made. Headquartered in Camas, Washington, nLIGHT is a publicly listed company (NASDAQ: LASR). Position Summary nLIGHT is seeking a Senior Mechanical Engineer to contribute to the development of high-power fiber laser amplifiers and directed-energy laser systems. This role requires strong opto-mechanical design skills and hands-on experience developing rugged, production-ready hardware for demanding military environments. The Senior Mechanical Engineer will work within a multidisciplinary team spanning optical, electrical, thermal, and systems engineering, with primary responsibility for...
nL
Jan 24, 2026
Full time
Principal Mechanical Engineer - Defense
nLIGHT Camas, WA
Description Who We Are At nLIGHT, we are constantly on the cutting-edge of laser technology in a massively growing market. We are a leading provider of high-power semiconductors and fiber lasers for industrial, microfabrication, and aerospace & defense applications, to name a few. Our lasers are changing not only the way things are made, but also changing the things that can be made. Headquartered in Camas, Washington, nLIGHT is a publicly listed company (NASDAQ: LASR). Position Summary nLIGHT is seeking a Principal Mechanical Engineer to provide technical leadership in the development of high-power fiber laser amplifiers and directed-energy laser systems. This role requires deep expertise in opto-mechanical design and system-level thinking, with responsibility for mechanical architecture, design trade studies, and technical execution across complex programs. The Principal Mechanical Engineer will work closely with optical, electrical, thermal, and systems...
AA
Nov 03, 2025
Full time
Innovation and Development Engineer II - NC Programmer
$90,000 - $110,000 yearly
AIM Aerospace, Inc. Renton, WA
We are continuing to grow! We are currently accepting applications for an upcoming Engineer II, Innovation and Development need at our Renton location. Engineer II, Innovation and Development Location(s): Renton, WA Job Type: Full-time - Exempt Benefits Medical (free employee-only coverage and low-cost options available) Dental, Vision, Prescription Life and AD&D Insurance Company-sponsored 401(k) with Employer Match Employee Assistance Program Wellness Program Tuition Reimbursement Employee Discounts 8 Paid Holidays plus closed (with pay) for a week during the winter break! 15 days per year accrued Vacation/Sick time. Annual Salary: $90,000 - $110,000 Position The Innovation and Development Engineer II will be responsible for supporting individual material and process development projects related to developing new composite products for various aerospace applications, encompassing conceptual design, process technology development, and...
HE
Mar 01, 2026
Full time
Mechanical Engineer
Helion Energy Everett, WA
About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone. Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). We are now operating Polaris, our next prototype on the path to the world's first fusion power plant. This is a pivotal time to join Helion. You will tackle real-world challenges with a team that prizes urgency, rigor, ownership, and a commitment to delivering hard truths - values essential to achieving what no one has before. Together, we will change the future of energy,...
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