RFIC Thermal Engineer

Shield AI is looking for an Engineer II with a focus on Avionics Thermal Engineering. This position is based in the United States and centers on strengthening the performance and reliability of avionics systems by developing advanced thermal solutions. Role overview This role involves working as part of a collaborative engineering team dedicated to designing and refining thermal systems for avionics hardware. The work supports avionics reliability across a variety of flight conditions, ensuring systems perform as intended in demanding environments. What you will do Partner with other engineers to design and improve thermal systems for avionics hardware Create solutions that enable avionics to function reliably under different flight scenarios Apply technical knowledge to boost overall system performance

Join Shield AI, a pioneering deep-tech company founded in 2015, dedicated to safeguarding service members and civilians through innovative intelligent systems. Our cutting-edge products, including the V-BAT and X-BAT aircraft, Hivemind Enterprise, and Hivemind Vision, are utilized globally, with offices and facilities across the U.S., Europe, the Middle East, and the Asia-Pacific. For more details, visit www.shield.ai. Connect with us on LinkedIn, X, Instagram, and YouTube.Job Overview:Are you an innovative thermal engineer passionate about developing state-of-the-art AI and aircraft products? Do you aspire to make a positive impact in the world while collaborating with mission-driven teammates? At Shield AI, you will thrive!As a Senior Staff Thermal Engineer, you will spearhead the design, analysis, and integration of advanced aircraft avionics thermal management systems, with opportunities to engage in aircraft-level thermal and fluid systems.This role is perfect for an engineer who excels in first-principles problem-solving, embraces ambiguous challenges, and possesses strong communication and collaboration skills to bridge various technical disciplines. You will play a pivotal role in design development, mentor fellow engineers, and ensure comprehensive thermal solutions that satisfy critical aerospace requirements.

Mach Industries designs autonomous defense systems with an emphasis on scalable and decentralized technology. Founded in 2022, the company aims to enhance the strategic capabilities of the United States and its allies. The team includes about 220 professionals who bring a startup mindset to national security challenges. Mach Industries prioritizes advanced manufacturing and rapid innovation to help deter kinetic conflicts and support global stability.

About Inversion Space Inversion Space is working to make space a practical part of Earth's transportation network. The team is developing advanced re-entry vehicles designed for precise landings and reliable returns from orbit. The goal: create a standardized route connecting space and Earth, expanding global access. Role Overview: Avionics Harness Engineer II The Avionics Harness Engineer II joins the Avionics team to design and integrate harnesses from early concepts through full system integration. This role involves selecting components, developing processes, qualifying designs, and supporting production. The position offers hands-on work at both the subsystem and system level, with frequent collaboration across engineering disciplines. The Avionics Harness Engineer II reports to the Director of Engineering, Avionics.

About Relativity Space Relativity Space is building rockets for today’s and tomorrow’s missions. The Terran R vehicle is engineered to deliver customer payloads to orbit, meeting a growing need for launch capacity. Success with Terran R will open new doors for science, exploration, and innovation far beyond Earth. At Relativity, autonomy and ownership are part of daily work. Employees tackle complex challenges, help develop rockets and factories from the ground up, and see their impact quickly. Collaboration is central, teams across propulsion, manufacturing, software, avionics, and corporate functions work together and influence outcomes. Creativity and technical rigor go hand in hand here. As Terran R advances, team members help shape the product, process, and culture. About the Avionics Team The Avionics team manages the full lifecycle of Terran R’s electrical systems. This includes designing, building, testing, installing, and operating the hardware that connects and controls all major electrical systems on the vehicle and on the ground. The team works closely across avionics design, manufacturing, and testing, enabling rapid iteration and feedback. Engineers also partner with propulsion, GNC, fluids, and stage engineering groups to ensure seamless system integration and operation.

About UsAt vinci4d, we are revolutionizing hardware design with our innovative AI assistant. Our cutting-edge product empowers engineers to explore, analyze, and optimize hardware systems seamlessly, integrating advanced AI technology with the practicalities of engineering design workflows.Role OverviewWe are on the lookout for a skilled Thermal Application Engineer who will engage directly with our customers to execute and validate their test cases using our product. Acting as a crucial link between our technology and users, you will ensure that customer requirements are met, test cases are thoroughly executed, and results are presented in a meaningful way. In addition, you will assist customers with inquiries about our software and provide training on new features.Collaboration is key; you will work closely with both customers and our product and engineering teams to facilitate the evaluation and deployment of AI-enhanced workflows.A solid foundation in thermal engineering is essential for this role—you should be adept at leading discussions on thermal analysis with customers, covering topics such as heat transfer, CFD/FEA thermal simulations, cooling architectures, derating, and reliability considerations.

Mach Industries, based in Huntington Beach, develops next-generation autonomous defense platforms. Founded in 2022, the company focuses on scalable and decentralized defense systems that strengthen the strategic capabilities of the United States and its allies. With a team of about 220 professionals, Mach Industries combines startup agility with a mission to advance the future of defense technology. The Thermal Engineer will play a key role in designing and optimizing thermal management systems for Mach’s vehicles. This position involves analyzing how heat transfer, thermal loads, and environmental factors affect vehicle performance and structural integrity. Collaboration with teams in propulsion, structural engineering, and aerodynamics is central to integrating thermal solutions that maintain both performance and manufacturability. What you will do Design, analyze, and optimize thermal management systems at both system and component levels for vehicle platforms. Assess the impact of heat transfer and thermal loads on vehicle performance and structure through detailed analysis. Work closely with cross-functional teams to integrate effective thermal solutions into vehicle designs. Develop and carry out thermal testing procedures, including thermal cycling, environmental assessments, and failure mode analysis. Provide insights on how different thermal management systems influence overall vehicle performance. Create technical documentation, such as thermal analysis reports, design guidelines, and test reports. Requirements Experience in thermal analysis for aerospace applications, including engines, avionics, or aircraft structures. Strong understanding of heat transfer principles and the effects of thermal loads on avionics and structures. Proficiency with thermal analysis and simulation tools like STAR-CCM+, Icepak, Simscape, or AMESim. Background in thermal testing, validation, and environmental testing methods. Knowledge of designing scalable thermal solutions suitable for mass production. Excellent collaboration and communication skills for working across multiple engineering disciplines.

Join our innovative team at Aetherflux as a Power Avionics Engineer. In this pivotal role, you will be responsible for designing, developing, and testing advanced avionics systems that power the next generation of aerospace technology. Your expertise will contribute to projects that enhance safety, efficiency, and performance in the aviation industry.

At Relativity Space, we are revolutionizing space travel by designing and manufacturing rockets that meet the demands of today while paving the way for tomorrow's innovations. Our Terran R vehicle is set to deliver customer payloads to orbit, responding to the increasing need for launch capabilities. However, this is merely the beginning. The commercial success of Terran R will create new pathways for scientific advancement, exploration, and innovation—pushing the boundaries of what we know.By joining Relativity, you become part of a culture that prioritizes autonomy, ownership, and impact at every level. Here, you won't just be completing tasks; you will be tackling unprecedented challenges, contributing to the development of a rocket, a factory, and a business from the ground up. Regardless of whether you're in propulsion, manufacturing, software, avionics, or corporate functions, you will collaborate across teams, influence decisions, and witness your contributions come to fruition at an astonishing pace. This is a place where creativity meets technical excellence, and your insights will shape the narratives we create together. Now is a pivotal moment where you can leave your imprint on the product, the process, and the culture, while the Terran R is gaining traction. The most impactful work of your career awaits you. Join us.About the Team: The Interplanetary Sciences Program was founded to broaden access to scientific exploration throughout our solar system. Its goal is to enhance planetary research by making it faster, more cost-effective, and more capable than ever before by reimagining the design, construction, and operation of science missions. Our aim is to empower scientists to deploy instruments to remote worlds without enduring decades of development or exorbitant costs.

Join Radiant Industries as a Senior Thermal Engineer, where you will play a crucial role in developing innovative thermal solutions for our cutting-edge projects. You will collaborate with a dynamic team of engineers and scientists to enhance product performance through advanced thermal management techniques.

Design and develop high-fidelity 1-D thermal system and component-level models to enhance fuel economy and vehicle performance evaluations.Conduct model correlation and validation against empirical test data to guarantee simulation precision and predictive capability.Evaluate vehicle performance and the durability of thermal systems across a diverse range of mission profiles and duty cycles.

At SpaceX, we believe in a future where humanity expands its horizons beyond Earth, exploring the vastness of space. We are committed to developing groundbreaking technologies that will enable human life on Mars and beyond.THERMAL ENGINEER - THERMAL & FLUID ANALYSIS (STARSHIP)As a key member of the Starship Thermal & Fluid Analysis team, you will play a crucial role in the thermal design, testing, and validation of our cutting-edge vehicles and hardware. Your engineering expertise will directly enhance vehicle performance and reliability, contributing to the development of a fully reusable transportation system aimed at transporting crew and cargo to Earth orbit, the Moon, Mars, and beyond.

At Relativity Space, we are revolutionizing space technology by creating rockets that address current demands and future innovations. Our Terran R vehicle is designed to transport customer payloads to orbit, catering to the increasing need for launch capacity. This is merely the beginning; achieving commercial success with Terran R will pave the way for groundbreaking advancements in science, exploration, and innovation, driving progress into uncharted territories.Becoming a part of Relativity means joining a team where autonomy, ownership, and impact are present at every level. You won't just carry out tasks; you'll tackle unprecedented challenges, contributing to the development of a rocket, a factory, and an entire business from the ground up. Whether your expertise lies in propulsion, manufacturing, software, avionics, or corporate functions, you'll collaborate across teams, influence decisions, and witness your contributions materialize in record time. Relativity is a place where creativity intertwines with technical precision, and your voice will be instrumental in shaping our collective narrative. This is a unique opportunity to leave your mark on the product, the process, and the culture as we bring Terran R to life. The most significant work of your career awaits you. Join us.About the Team: The Interplanetary Sciences Program was established to broaden access to scientific exploration throughout our solar system. Its mission is to accelerate planetary research, making it more affordable and capable than ever before by reimagining the design, construction, and operation of science missions. The program aims to empower scientists to deploy instruments to distant worlds without the lengthy development timelines and prohibitive costs that have historically been associated with such endeavors.

About VardaLow Earth orbit is open for business. Varda is pioneering the advancement of commercial space infrastructure, from in-orbit pharmaceutical processing to dependable and cost-effective reentry capsules.From life-saving pharmaceuticals to enhanced fiber optics, a myriad of products utilized on Earth today can only be produced in space. Varda is driving innovation in the orbital economy by establishing both the products and infrastructure required for space to directly enhance life on Earth. Our mission is to expand the economic horizons of humanity.Our team is exceptionally equipped to achieve this objective, with leadership and personnel comprising veterans from SpaceX, Blue Origin, leading pharmaceutical companies, and Silicon Valley. Founded in January 2021 by Will Bruey and Delian Asparouhov, Varda is supported by esteemed investors including Khosla Ventures, Lux Capital, Founders Fund, Caffeinated Capital, General Catalyst, and Also Capital.Varda's headquarters is located in El Segundo, California, where we operate offices and a production facility for building, integrating, and testing our vehicles, equipment, and materials. Additionally, Varda has offices in Washington, DC, and Huntsville, AL.Join Varda and contribute to the creation of a thriving in-space ecosystem.

Astranis is at the forefront of satellite technology, creating advanced satellites designed for high orbits that extend humanity's reach into the solar system. Currently, our satellites deliver dedicated, secure networks to a diverse range of sophisticated clients, including large enterprises, sovereign governments, and the U.S. military. With five satellites successfully in orbit and numerous launches planned, we manage a backlog exceeding $1 billion in commercial contracts.As the preferred satellite communications partner for clients with rigorous demands for uptime, data security, network visibility, and customization, Astranis has attracted over $750 million from some of the world's leading investors, including Andreessen Horowitz, Blackrock, and Fidelity. Our dynamic team of 450 engineers and entrepreneurs operates from our expansive 153,000 sq. ft. headquarters in Northern California.Senior Thermal EngineerAs a Senior Thermal Engineer at Astranis, you will play a pivotal role in designing, evaluating, and testing thermal solutions that range from electronic chips to comprehensive spacecraft thermal vacuum assessments. A strong background in problem-solving and practical testing skills is essential. While experience in spacecraft or printed circuit board thermal mitigation is advantageous, it is not a prerequisite.Role ResponsibilitiesIdentify and refine feasible thermal architectures, advancing designs through conceptual, preliminary, and detailed phases using a combination of passive and active thermal control techniques.Lead design trades that effectively balance performance margins, resource utilization, risk, cost, and scheduling.Conduct thermal analyses with varying levels of fidelity on diverse hardware types, including propulsion components, batteries, high-powered electronics, RF components, mechanisms, and printed circuit boards (PCBs).Design, evaluate, procure, and test thermal solutions, including heaters, heat pipes, thermal interface materials, and surface coatings.Create processes and procedures for the integration and assembly of thermal systems to ensure adherence to design intent. Collaborate closely with the integration and test team during the installation of thermal hardware.Plan and oversee thermal vacuum testing and verification at both the component and spacecraft levels.Mentor and support junior engineers, fostering their professional development.Assist in recruiting, interviewing, and onboarding new team members as we expand rapidly.

About Matter IntelligenceMatter Intelligence is at the forefront of developing cutting-edge airborne and spaceborne sensing systems that integrate precision optics, innovative thermal architectures, spacecraft engineering, and AI-enhanced data analysis. Our advanced systems function effectively in challenging orbital and airborne environments, unlocking new possibilities for Earth observation capabilities.With a proven track record of delivering technologies to Mars for NASA/JPL, designing advanced sensors for U.S. defense, and establishing core infrastructure at OpenAI, our team is now focused on creating the next generation of sensing systems for both space and airborne applications.About the RoleWe are looking for a Senior Thermal Engineer who will take charge of the thermal architecture, analysis, and verification of our precision optical payloads and spacecraft systems. This role encompasses ownership of thermal performance from the initial concept stage through integration, testing, and, where applicable, on-orbit operations.You will be responsible for developing and maintaining intricate thermal models, steering thermal trade studies, supporting STOP performance, and collaborating closely with systems, optomechanical, electronics, and AI & T teams to ensure that flight hardware meets all performance requirements throughout every mission phase.This is a hands-on, analytical, and leadership-focused role suited for an engineer seeking significant technical ownership over hardware that operates in flight.Key ResponsibilitiesThermal Architecture & DesignDefine and lead the thermal architecture for optical payloads and spacecraft subsystems.Design both passive and active thermal control solutions, including radiators, heat pipes, thermal straps, insulation, and cryogenic interfaces.Translate mission-level thermal requirements into subsystem- and component-level designs.Support thermal trades to effectively balance performance, mass, power, and complexity.Thermal Modeling & AnalysisDevelop, maintain, and correlate detailed thermal models using industry-standard tools (e.g., Thermal Desktop, SINDA/FLUINT).Conduct steady-state and transient thermal analyses across all mission phases (launch, ascent, on-orbit hot/cold cases, safe modes).Perform in-depth thermal analysis of precision optical elements (mirrors, mounts, focal plane assemblies), including thermo-elastic distortion.Execute thermal assessments at the circuit card and chassis level.

At SpaceX, we believe in a future where humanity explores the cosmos, and we are dedicated to turning this vision into reality. As a Senior Thermal Engineer on the Starship Thermal & Fluid Analysis team, you will play a critical role in the thermal design, testing, and validation of spacecraft and related hardware. Your expertise will contribute to enhancing vehicle performance and reliability, driving forward our mission to create a fully reusable transportation system that supports crew and cargo missions to Earth orbit, the Moon, Mars, and beyond.

Anduril Industries develops advanced defense technology for the U.S. and allied military forces. The company combines technical expertise with agile practices to deliver military systems quickly. Its Lattice OS platform uses AI to transform large data sets into real-time 3D command and control, supporting autonomy, computer vision, sensor fusion, and networking. The team aims to provide new military capabilities in months, not years. The Test and Analysis team at Anduril makes sure products can handle demanding air, land, sea, and space conditions. Team members collaborate with product groups throughout the lifecycle, from design and development to validation. Their work covers requirement analysis, environmental and electromagnetic interference testing, reliability assessment, and support for sustainable manufacturing. Analytical modeling, including structural-thermal-optical performance (STOP) analysis, helps identify ways to improve durability and deliver solutions efficiently. Role overview The Senior Thermal Engineer leads thermal analysis and design for hardware development programs in Boulder, Colorado. This role spans the full product cycle, from initial concept to production, with a focus on developing and validating models that enable rapid prototyping of advanced systems. What you will do Perform first-order thermal assessments to guide early design decisions Build detailed analytical models to refine prototype hardware Produce thermal predictions that inform and support hardware testing This position involves close collaboration with multidisciplinary teams and hands-on involvement in both analysis and testing phases. Location Boulder, Colorado, United States

ABOUT ROCKET LABRocket Lab is a pioneering end-to-end space solutions provider, setting the standard for responsive launch services, comprehensive spacecraft design and manufacturing, satellite components, and more—all aimed at democratizing access to space. Our rockets and satellites empower some of the world's most ambitious and critical space missions, from scientific exploration and Earth observation to combating climate change and enhancing national security.The Electron rocket has become the second most frequently launched U.S. rocket annually, successfully delivering over 230 satellites into orbit. We are also developing Neutron, our upcoming medium-lift, reusable launch vehicle designed for larger constellation deployments. Additionally, our Space Systems division designs and manufactures a wide array of satellites and payload components, including systems selected for NASA missions to the Moon and Mars and parts utilized in the James Webb Space Telescope.ABOUT NEUTRONNeutron is poised to become a medium-lift launch vehicle capable of delivering tomorrow's mega constellations, high-assurance payloads, and supporting human spaceflight missions. As a highly reusable platform, Neutron will offer a cost-effective and reliable launch solution, leveraging Rocket Lab's proven success with the Electron program. If you are eager to join a high-performing team and push the boundaries of space technology with a clean-sheet, reusable launch vehicle, we invite you to explore this opportunity!MECHANICAL ENGINEER II - NEUTRON AVIONICSStationed at Rocket Lab's headquarters in Long Beach, CA, the Mechanical Engineer II for Neutron Avionics will spearhead the development and implementation of mechanical designs and packaging solutions for the electronics powering Neutron. You will be responsible for creating vital mechanical components that enable avionics throughout the vehicle, including the Archimedes engine and GNC systems.