Propulsion Engineer Intern - Summer/Fall 2026

Join Hermeus, a pioneering high-speed aircraft manufacturer, as an Integration Engineer specializing in Fluid & Propulsion Systems. In this dynamic role, you will take charge of the design release, construction, testing, and delivery of essential vehicle fluid, propulsion, and mechanism assemblies, including control surface actuators, spike inlet systems, and engine integration. Your expertise will serve as the essential link between design, manufacturing, and testing, ensuring our hardware is crafted with the highest standards of precision and reliability. We are looking for a hands-on engineer with a robust background in mechanical systems, propulsion, and fluids, capable of steering complex assemblies from concept through validation in a fast-paced, first-principles environment.

The aerospace industry is on the brink of a revolution, with spacecraft representing a critical gap that needs to be filled. As more launch vehicles become operational and the costs of reaching orbit decrease, an increasing number of companies are emerging to launch payloads into space.This unprecedented surge in payload companies, coupled with reduced launch costs, has created an enormous demand for commercial spacecraft platforms, commonly referred to as satellite buses. These platforms are essential for housing our customers' payloads and are designed to be launched into space.At Apex, we manufacture these satellite buses at scale, leveraging advanced software, vertical integration, and purpose-engineered manufacturing hardware. Our spacecraft are pivotal to the future of society, supporting endeavors ranging from Earth observation to telecommunications and beyond.Join us in our mission to provide humanity with access to the cosmos beyond our planet.About the RoleApex is in search of a skilled Propulsion Mechanical Engineer to take charge of the mechanical designs for our spacecraft propulsion systems. You will lead the design, analysis, and qualification of propulsion hardware, ensuring its reliability through the demanding conditions of launch and extended on-orbit operations. This role encompasses a variety of responsibilities, including mechanical design, fluid system development, thermal interface management, and flight hardware qualification, with complete oversight from initial concept to flight readiness and operational performance.You will collaborate closely with propulsion, thermal, avionics, and systems engineering teams to deliver robust and reproducible propulsion hardware designed for production spacecraft.

Join Hermeus as a Propulsion Integration Technician, where you'll work on cutting-edge propulsion systems for high-Mach and hypersonic aircraft. In this pivotal role, you will collaborate closely with engineers to transform design concepts into tangible solutions, offering essential insights into manufacturability and performance. Your hands-on expertise in developing propulsion systems in dynamic prototype environments will drive innovation and contribute to our mission of maintaining national security through advanced aerospace technologies.

At K2 Space Corporation, we are pioneering the creation of the largest and most powerful satellites ever deployed, pushing performance boundaries across all orbits. Supported by $450 million from top-tier investors such as Altimeter Capital, Redpoint Ventures, T. Rowe Price, and Lightspeed Venture Partners, along with $500 million in signed contracts with commercial and U.S. government clients, we are set to mass-produce the highest-power satellite platforms designed for missions ranging from Low Earth Orbit (LEO) to deep space.The emergence of heavy-lift launch vehicles is transforming the industry from an era of mass limitations to one of mass abundance. We believe this new phase necessitates a fundamentally different class of spacecraft. Our satellites are engineered to endure the harshest radiation environments and maximize the potential of today’s and tomorrow’s powerful rockets, providing unmatched capabilities at a constellation scale across various orbits.With multiple launches scheduled through 2026 and 2027, we are committed to 'Building Bigger' to explore the solar system and evolve into a Kardashev Type II (K2) civilization. If you are an ambitious individual who thrives in a dynamic and fast-paced environment, and if you are eager to contribute to the success of a groundbreaking Series C space startup, we would be thrilled to receive your application.

Apex Technology Inc. designs and manufactures satellite buses in Los Angeles, supporting a new wave of commercial spacecraft. As more organizations send payloads to orbit and launch costs fall, the need for dependable satellite buses continues to grow. Apex meets this demand with a combination of advanced software, vertical integration, and specialized hardware, enabling efficient production for missions ranging from Earth observation to global communications. Role overview The Senior Chemical Propulsion Engineer will lead the design and development of chemical propulsion systems for Apex’s spacecraft bus. This position is the first of its kind at Apex, offering the chance to set the technical direction for propulsion, shape system architecture, and build out both the team and infrastructure. The role is hands-on and foundational, with significant influence over integration and testing processes. What you will do Design, develop, and test chemical propulsion systems for satellite buses Define system architecture and technical requirements for propulsion Oversee integration of propulsion systems with spacecraft hardware and software Establish processes and infrastructure for propulsion system development and testing Collaborate with other engineering teams to ensure spacecraft performance and reliability Location This position is based in Los Angeles, California.

Join Hermeus as a GNC Engineer specializing in Navigation and System Integration, where your expertise will propel the future of flight. In this pivotal role, you will collaborate with a team of talented engineers to design, implement, and refine guidance, navigation, and control systems for our cutting-edge aircraft. Your contributions will directly impact the performance and safety of our innovative solutions.

We are seeking a highly skilled and experienced Senior GNC Engineer specializing in Navigation and System Integration to join our dynamic team at Hermes. In this role, you will be instrumental in the development and implementation of innovative guidance, navigation, and control systems for our advanced aerospace projects. Your expertise will contribute to the design and integration of cutting-edge technologies that push the boundaries of what's possible in the aerospace industry.

About Hermeus Hermeus designs and builds high-speed aircraft, focusing on high-Mach and hypersonic vehicles. The company partners with the Department of Defense to deliver advanced flight capabilities that support national and allied interests. Role Overview The Build Engineer - Propulsion position sits at the intersection of engineering, manufacturing, integration, and testing for flight vehicles. This role works hands-on with both design and production teams throughout the lifecycle of propulsion hardware. What You Will Do Own hardware design and tooling for propulsion systems Support and execute testing and vehicle assembly Drive process development for efficient integration and flight readiness Collaborate with design and manufacturing teams to deliver reliable propulsion solutions Who We’re Looking For Hermeus considers candidates at all experience levels, from entry-level engineers to seasoned professionals. Location Based in Los Angeles, CA.

Join Hermes as a Lead Propulsion Component Engineer in Los Angeles, CA, where you will spearhead the development of innovative propulsion components for cutting-edge aerospace applications. In this pivotal role, you'll leverage your extensive engineering expertise to drive projects from concept through to production, ensuring the highest standards of quality and performance.

As a Propulsion Component Responsible Engineer at Hermeus, you will play a critical role in the design, development, and validation of propulsion systems for our cutting-edge aerospace technology. Your expertise will help us push the boundaries of hypersonic flight. You will collaborate with cross-functional teams to ensure that our propulsion components meet rigorous performance, safety, and reliability standards.

Join k2spacecorporation as a Propulsion Electrical Test Engineer, where your expertise will play a vital role in advancing propulsion technologies. You will work closely with cross-functional teams to design, implement, and troubleshoot electrical systems in propulsion units. This position offers an exciting opportunity to work on cutting-edge projects in a collaborative environment.

The aerospace industry is experiencing unprecedented growth, with spacecraft becoming an essential component in addressing the increasing demand for satellite services. As more launch vehicles are introduced and costs to access space diminish, a new wave of companies is emerging to fulfill this demand.This surge in payload companies, combined with reduced launch costs, has created a significant need for commercially viable spacecraft platforms, also known as satellite buses. These buses are designed to carry our clients' payloads into orbit.At Apex, we manufacture these satellite buses at scale by leveraging innovative software, vertical integration, and manufacturing-focused hardware. Our spacecraft pave the way for the future of society, facilitating everything from earth observation to advanced communications.We invite you to join our mission to provide humanity with access to the vastness of space.About the RoleApex is on the lookout for a highly skilled Senior Electric Propulsion Engineer to be a vital part of our dynamic team. In this role, you will lead the design and development of propulsion systems tailored to meet the specifications of our spacecraft bus. This is a unique opportunity to start with a clean-sheet design approach, influencing propulsion system architecture, integration, and testing to achieve peak performance.

At K2 Space Corporation, we are pioneering the development of the largest and most powerful satellites ever flown, unlocking unprecedented performance across various orbits. Fueled by $450 million in investment from top-tier investors such as Altimeter Capital, Redpoint Ventures, T. Rowe Price, and Lightspeed Venture Partners, alongside an additional $500 million in contracts with commercial and U.S. government clients, we are committed to mass-producing high-power satellite platforms designed for missions ranging from Low Earth Orbit (LEO) to deep space.The emergence of heavy-lift launch vehicles is transforming the industry from mass constraints to mass abundance, necessitating a new class of spacecraft. Our satellites are engineered to withstand the harshest radiation environments while maximizing the capabilities of today’s and tomorrow’s massive rockets, offering unmatched performance at constellation scale across multiple orbits.With multiple launches scheduled through 2026 and 2027, we are dedicated to building a future that develops our solar system and advances us towards becoming a Kardashev Type II (K2) civilization. If you are a driven individual who thrives in a dynamic environment and is eager to contribute to the success of a groundbreaking Series C space startup, we welcome your application.

Join Hadrian - Pioneering the Future of ManufacturingAt Hadrian, we are revolutionizing the aerospace and defense sectors by constructing autonomous factories capable of producing rockets, satellites, jets, and ships with efficiency that is up to 10 times faster and 2 times more cost-effective. Leveraging cutting-edge software, robotics, and comprehensive manufacturing processes, we are transforming the way America creates its most vital components.With our recent $260 million Series C funding, we are poised for rapid expansion. We're excited to announce the opening of a new 270,000 square foot factory in Mesa, Arizona, generating 350 immediate job opportunities. Our new headquarters will support thousands of future hires, while our Hadrian Maritime branch will focus on naval production, alongside our innovative Factory-as-a-Service model that provides complete systems rather than just parts.Hadrian collaborates with startups, Tier 1 and Tier 2 suppliers, and prominent defense contractors in space, shipbuilding, and aviation to enhance production scalability, reduce costs, and expedite delivery for mission-critical projects. Supported by esteemed investors such as Lux Capital, Founders Fund, and Andreessen Horowitz, our rapidly growing team shares a common goal: to reindustrialize American manufacturing for the 21st century and beyond!We are currently seeking a motivated Customer Integration Engineer who excels at onboarding new clients and translating their specifications into practical solutions on the factory floor. This position reports to the Manager of Customer Integration and requires a technically skilled engineer who can effectively connect customer needs with Hadrian’s innovative manufacturing and software capabilities. The ideal candidate thrives at the intersection of engineering, manufacturing, and customer success, bringing clarity, structure, and urgency to complex integration initiatives.If you are passionate about cultivating strong, value-driven customer relationships, enjoy tackling challenges in high-pressure environments, and aspire to play a pivotal role in scaling Hadrian’s customer integration operations, we would love to hear from you!

At K2 Space Corporation, we are on a mission to develop the most powerful satellites ever launched, expanding the boundaries of what’s possible across all orbits. With a remarkable investment of $450 million from top-tier investors such as Altimeter Capital, Redpoint Ventures, T. Rowe Price, Lightspeed Venture Partners, and Alpine Space Ventures, we are set to revolutionize space exploration. Additionally, we have secured $500 million in contracts from both commercial and US government clients, enabling us to mass-produce unprecedented satellite platforms designed for missions ranging from Low Earth Orbit (LEO) to deep space.The emergence of heavy-lift launch vehicles is propelling the industry into a new age of abundance, prompting the need for a new class of spacecraft. Our satellites are meticulously engineered to withstand extreme radiation environments and to leverage the capabilities of today’s and tomorrow’s massive rockets, offering unparalleled performance at constellation scale across diverse orbits.With multiple launches scheduled through 2026 and 2027, we are committed to building the future of the solar system and aspire to elevate humanity to a Kardashev Type II (K2) civilization. If you are an enthusiastic individual who excels in a dynamic environment and are eager to contribute to the success of an innovative Series C space startup, we invite you to apply.

Join Hermeus, a pioneering manufacturer of high-speed aircraft, as a Fluids Integration Technician. In this dynamic role, you will take charge of assembling, installing, and testing intricate fluid and electromechanical systems that are vital to our flight and propulsion hardware. Your expertise will involve hands-on work with hydraulic tubing and pressurized systems, while collaborating closely with our engineering and operations teams. This position is perfect for a motivated technician who excels in fast-paced settings, possesses strong abilities in interpreting technical schematics, and is dedicated to enhancing critical flight systems.

Join Hermeus, a pioneering manufacturer of high-speed aircraft dedicated to the rapid design, construction, and testing of high-Mach and hypersonic aircraft serving national interests. Collaborating closely with the Department of Defense, we provide innovative capabilities that enable our nation and allies to maintain a significant strategic advantage over potential adversaries.As a Performance Engineer, you will play a crucial role in analyzing, modeling, and optimizing aircraft and propulsion system performance across the full flight envelope. This position demands robust expertise in gas turbine engine cycles, aerodynamics, and thermodynamics, facilitating aircraft development, certification, and operational excellence.

K2 Space Corporation is at the forefront of satellite innovation, developing the largest and most powerful satellites ever launched. With a groundbreaking vision, we are unlocking unprecedented performance capabilities across all orbits. Supported by $450M in funding from top investors like Altimeter Capital, Redpoint Ventures, T. Rowe Price, Lightspeed Venture Partners, and Alpine Space Ventures, alongside an additional $500M in contracts with commercial and government clients, we are set to mass-produce unparalleled satellite platforms for missions extending from Low Earth Orbit (LEO) to deep space.The evolution of heavy-lift launch vehicles is ushering in a new era of mass abundance in the space industry, compelling us to develop a revolutionary class of spacecraft. Our satellites are engineered to endure extreme radiation environments, maximizing the potential of current and future massive rockets, thereby delivering unmatched capabilities at a constellation scale across various orbits.With multiple launches scheduled for 2026 and 2027, we are committed to expanding our reach within the solar system and striving toward becoming a Kardashev Type II (K2) civilization. If you are a driven individual who excels in a dynamic environment and are passionate about contributing to the success of an innovative Series C space startup, we invite you to apply.

Join Apex Technology Inc. as a Spacecraft Integration Engineer and play a vital role in the integration of advanced spacecraft systems. You will collaborate with cross-functional teams to ensure optimal performance and reliability of spacecraft components. This position is ideal for individuals passionate about aerospace engineering and looking to contribute to cutting-edge space exploration projects.