logo inner

Senior / Principal Propulsion Engineer


ABOUT ROCKET LAB


Rocket Lab is an end-to-end space company delivering responsive launch services, complete spacecraft design and manufacturing, payloads, satellite components, and more – all with the goal of opening access space. The rockets and satellites we build, and launch enable some of the most ambitious and vital space missions globally, supporting scientific exploration, Earth observation and missions to combat climate change, national security, and exciting new technology demonstrations.  Our Electron rocket has become the second most frequently launched U.S.

rocket annually and has delivered more than 230 satellites to orbit, all while we work to develop Neutron, our upcoming medium-lift, reusable launch vehicle for larger constellation deployment. Our Space Systems business designs and builds our extensive line of satellites, payloads, and their components, including spacecraft that have been selected to support NASA missions to the Moon and Mars and components used on the James Webb Space Telescope. 

NEUTRON


Neutron is a medium lift launch vehicle capable of delivering the mega constellations of tomorrow, high assurance payloads, and human spaceflight. As a highly reusable launch platform, Neutron will deliver a highly cost-effective and reliable launch solution leveraging Rocket Lab’s proven execution history with the Electron program. If you’re interested in joining a high performing team, pushing the boundaries with a clean sheet development of re-usable liquid launch vehicle, this is your opportunity!

SENIOR / PRINCIPAL PROPULSION ENIGNEER


As Senior/Principal Propulsion Engineer, you will play a critical role in the development, testing, and operation of the Archimedes Engine family, a cornerstone of the Neutron rocket program. You will take ownership of subsystems and engine operation, driving design, analysis, testing, and operational readiness. You will execute testing campaigns, analyze data, improve existing evaluation capability and refine designs for reliability and vehicle operations.This role demands technical expertise, strong autonomy, and the ability to align teams and projects to achieve program goals.

Principal Engineers will additionally drive value to teams outside their group, influencing cross-functional efforts and contributing to the broader success of the Neutron program.

WHAT YOU’LL GET TO DO:


  • Design, analyze, test, fly, and refly next generation propulsion hardware ensuring operational readiness and flight success.
  • Develop and execute test plans, including qualification and acceptance testing, and conduct post-test data reviews to refine designs and processes.
  • Collaborate across engineering disciplines to optimize engine performance, reliability, and manufacturability.
  • Generate high-level plans and prioritize tasks across teams, resolving competing priorities and ensuring alignment with program goals.
  • Mentor and guide engineers, fostering technical growth and collaboration.
  • Work with manufacturing, testing and vehicle operation teams to support engine needs, operation, and resolve issues each part of the engine lifecycle.

(This position can be hired as a Senior Propulsion Engineer I, Senior Propulsion Engineer II or Principal Propulsion Level)


YOU’LL BRING THESE QUALIFICATIONS AS A SENIOR PROPULSION ENGINEER I: 


  • Bachelor’s degree in mechanical engineering, aerospace engineering, or related field.
  • 5+ years of experience in rocket engine development, testing, or operations.
  • Strong technical understanding of fluid dynamics, thermodynamics, cryogenic systems, and rocket engine architecture.
  • Familiarity with engine P&IDs, fluid system routing, and hotfire data reviews.

YOU’LL BRING THESE QUALIFICATIONS AS A SENIOR PROPULSION ENGINEER II: 


  • Bachelor’s degree in mechanical engineering, aerospace engineering, or related field.
  • 8+ years of experience in rocket engine development, testing, or operations.
  • Strong technical understanding of fluid dynamics, thermodynamics, cryogenic systems, and rocket engine architecture.
  • Familiarity with engine P&IDs, fluid system routing, and hotfire data reviews.

YOU’LL BRING THESE QUALIFICATIONS AS A PRINCIPAL PROPULSION ENGINEER: 


  • Bachelor’s degree in mechanical engineering, aerospace engineering, or related field.
  • 12+ years of experience in rocket engine development, testing, or operations.
  • Strong technical understanding of fluid dynamics, thermodynamics, cryogenic systems, and rocket engine architecture.
  • Familiarity with engine P&IDs, fluid system routing, and hotfire data reviews.

THESE QUALIFICATIONS WOULD BE NICE TO HAVE:


  • Advanced degree in a fluid mechanics-heavy field.
  • Experience with ox-rich staged combustion systems and Methyl/LOX propellants.
  • Background in failure analysis, combustion dynamics, turbopump mechanics, and hydraulics.
  • Familiarity with reusable rocket engine systems and test/launch facility operations.
  • Experience with best practices for design, qualification, and production.

ADDITIONAL REQUIREMENTS:


  • Ability to travel to test and launch facilities (~25%).
  • Flexibility to work extended hours or weekends as needed.
  • Specific vision abilities required by this job include close vision, distance vision, peripheral vision, depth perception, and the ability to focus.
  • Regularly required to sit, use hands and fingers, operate computer keyboard and controls, and communicate verbally and in writing.
  • Occasional exposure to dust, fumes and moderate levels of noise.

Level and base salary will be determined on a case-by-case basis and may vary based on the following considerations: job-related knowledge and skills, education, and experience.Base salary is just one component of our total rewards package at Rocket Lab.  Employees may also receive company equity and access to a robust benefits package including: top tier medical HMO, PPO & a 100% company-sponsored medical HSA plan option, dental and vision coverage, 3 weeks paid vacation and 5 days sick leave per year, 11 paid holidays per year, flexible spending and dependent care savings accounts, paid parental leave, disability insurance, life insurance, and access to a 401(k) retirement plan with company match.

Other perks include: Discounted employee stock purchase program, subsidized EV charging stations, onsite gym, food and drinks, and other discounts. Eligibility for benefits may vary based on employment status, please check with your recruiter for a comprehensive list of the benefits available for this role. Benefit programs are subject to change at the company’s discretion.Base Pay Range (CA Only)$116,000 - $225,000USD

WHAT TO EXPECT


We’re on a mission to unlock the potential of space to improve life on Earth, but that’s not an easy task. It takes hard work, determination, relentless innovation, teamwork, grit, and an unwavering commitment to achieving what others often deem impossible. Our people out-think, out-work and out-pace. We pride ourselves on having each other’s backs, checking our egos at the door, and rolling up our sleeves on all tasks big and small. We thrive under pressure, work to tight deadlines, and our focus is always on how we can deliver, rather than dwelling on the challenges that stand in the way.  Important information:

FOR CANDIDATES SEEKING TO WORK IN US OFFICES ONLY:


To conform to U.S. Government space technology export regulations, including the International Traffic in Arms Regulations (ITAR), Rocket Lab Employees must be a U.S. citizen, lawful U.S. permanent resident (i.e., current Green Card holder), or lawfully admitted into the U.S. as a refugee or granted asylum, or be eligible to obtain the required authorizations from the U.S. Department of State and/or the U.S. Department of Commerce, as applicable. Learn more about ITAR here.Rocket Lab provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.

This policy applies to all terms and conditions of employment at Rocket Lab, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training.Applicants requiring a reasonable accommodation for the application/interview process for a job in the United States should contact Giulia Johnson at g.biow@rocketlabusa.com.This dedicated resource is intended solely to assist job seekers with disabilities whose disability prevents them from being able to apply/interview. Only messages left for this purpose will be considered. A response to your request may take up to two business days.

FOR CANDIDATES SEEKING TO WORK IN NEW ZEALAND OFFICES ONLY:


For security reasons background checks will be undertaken prior to any employment offers being made to an applicant.  These checks will include nationality checks as it is a requirement of this position that you be eligible to access equipment and data regulated by the United States' International Traffic in Arms Regulations. Under these Regulations, you may be ineligible for this role if you do not hold citizenship of Australia, Japan, New Zealand, Switzerland, the European Union or a country that is part of NATO, or if you hold ineligible dual citizenship or nationality.  For more information on these Regulations, click here ITAR Regulations.

Life at Rocket Lab USA

We are Rocket Lab and we're opening access to space to improve life on Earth. Rocket Lab is an orbital launch provider, delivering rapid and repeatable access to orbit for small satellites. Our team designs, builds and launches the Electron rocket - the world's first fully carbon composite orbital launch vehicle, powered by 3D printed, electric pump fed engines On January 21 2018, Rocket Lab reached orbit with the launch of the Electron vehicle and successfully deployed the company's first commercial payloads. It marked a significant milestone in eliminating commercial barriers and ushering in a new era of unprecedented access to space. Rocket Lab is headquartered in Huntington Beach, California, with operations and a launch pad in New Zealand. Electron is launched from Rocket Lab Launch Complex 1, the world's only private orbital launch range. Located in Mahia, New Zealand, and licensed to launch every 72 hours, Rocket Lab can accommodate an unprecedented launch cadence and reach orbital inclinations from sun-synchronous through to 39 degrees from a single site. Rocket Lab is also developing a second launch pad on US soil to provide unmatched schedule and location freedom. We are driven to broaden the horizons of what's already possible in space and are inspired by the possibilities not yet imagined. Rocket Lab's team is filled with the most driven, talented and passionate people youll ever work with. Our team culture is built on a foundation of collaboration, inclusion and innovation. If you want to be challenged, solve problems and work on the advanced space systems that are changing an entire industry, Rocket Lab is the place to do it. We're actively recruiting for a range of engineering, technical and corporate positions. To join our mission visit www.rocketlabusa.com/careers/
Thrive Here & What We Value1. Collaborative environment under pressure with a focus on delivering results2. Teamwork, hard work, determination, and commitment to achieving the impossible3. Equal employment opportunities, non-discrimination, background checks for security reasons4. Global leadership in space missions with innovation and result delivery5. Fast-paced environment valuing problem-solving, flexibility, creativity, and teamwork

Related Sub

This job belongs to these sub. Explore related roles here:
Your tracker settings

We use cookies and similar methods to recognize visitors and remember their preferences. We also use them to measure ad campaign effectiveness, target ads and analyze site traffic. To learn more about these methods, including how to disable them, view our Cookie Policy or Privacy Policy.

By tapping `Accept`, you consent to the use of these methods by us and third parties. You can always change your tracker preferences by visiting our Cookie Policy.

logo innerThatStartupJob
Discover the best startup and their job positions, all in one place.
Copyright © 2025