Stage Fluids Engineer II

Long Beach, CA

first seen Jul 25, 2026updated Sep 2, 2026

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The posting, in Rocket Lab's own words

archived Sep 2, 2026

ABOUT ROCKET LAB Rocket Lab is the end-to-end space company building rockets, spacecraft, and critical subsystems that keep the world connected, protected, expand humanity’s reach to the Moon, Mars, and beyond. We move fast, build real hardware for meaningful missions, and make the impossible routine. Come shape the future with us. NEUTRON Rocket Lab’s Neutron team is responsible for bringing our new large rocket Neutron and its launch and test sites to life. From designing and testing Neutron’s structures and components, to firing up its new Archimedes engines, to setting up Neutron’s launch pads and test sites across the United States, joining the Neutron team is your opportunity to help launch a new large rocket for the very first time. STAGE FLUIDS ENGINEER II A Stage Fluids Engineer II owns the design, build, and test of their fluid systems across the Neutron launch vehicle. Our team owns all plumbing and fluid systems between the tanks and the engines. Your work within the Fluid Systems department will turn vehicle-level requirements into a fluid network that enables Neutron to operate with aircraft-like reusability and reliability.

WHAT YOU’LL GET TO DO:

Design plumbing systems, components, and their secondary structures. Analyze these systems and components in the harsh and dynamic environments of launch. Model these systems to characterize and predict system behavior at all conditions. Test and qualify these systems and components. Manage requirements, realization, and implementation of systems in the larger launch vehicle context. Integrate your hardware into the vehicle. Review data from component, system, and vehicle level testing to optimize and improve future designs. Collaborate with components, propulsion, structures, mechanical, operations, and flight software teams to develop and define vehicle functions. Create tools to enhance the team’s analysis capabilities, streamline workflow and optimize launch operations.

Read the full posting ↓

YOU’LL BRING THESE QUALIFICATIONS:

Bachelor’s degree in Mechanical Engineering or relevant engineering discipline. 2+ years of experience in a hardware rich environment. Strong understanding on how to start, execute, and complete an engineering project. Strong engineering fundamentals in fluid dynamics and thermodynamics Working knowledge of how to select and design around fluid components such as valves, pressure vessels, flex elements & fittings. Working knowledge of DfM/DfAM, machining processes, and welding processes. Working knowledge of integration processes & quality control relevant to fluid systems & components.

THESE QUALIFICATIONS WOULD BE NICE TO HAVE:

4+ years of experience in a fast-paced aerospace environment where you have completed difficult projects while collaborating effectively with other key groups. Strong understanding of how to design for classic aerospace constraints: minimizing mass while maintaining manufacturability, function, and low costs. Ability to read, write, and manage plumbing & instrumentation diagrams. Strong understanding of mechanical drafting and GD&T. Ability to earn trust, maintain positive professional relationships, & contribute to a culture of inclusion. Experience working with a distributed team across the globe. Advanced degree in a fluid mechanics-heavy field. Experience with oxygen, methane, and/or cryogenic systems. Experience using fluids analysis tools such as REFPROP, AMESIM, and/or GFSSP. Alternatively, have built your own fluid network solver in Python, Excel, or other tools. Experience using mechanical analysis tools such as ANSYS or NASTRAN. Experience using Siemens NX & Teamcenter. Proven ability to practically apply engineering fundamentals to solve real, complex problems. Demonstrated ability to rally a team to make & execute good decisions in a fast-paced environment with limited information. This position may require prolonged periods of sitting, standing, walking, computer work, and occasional exposure to moderate levels of noise, dust, and fumes in production areas Anticipated annual equity grant value is designed around function, level, experience, and other factors; realized value depends on vesting and stock-price performance. Join one of the world's fastest-growing space companies and own a piece of it. In addition to competitive base pay, you'll receive company stock as part of your total compensation package , giving you a direct stake in our success. As we expand to new launch sites, groundbreaking missions, and global markets, your ownership has the opportunity to grow alongside the company. Our comprehensive benefits package includes our industry-leading Employee Stock Purchase Program (with a 15% discount on company stock), top-tier medical plans (HMO, PPO, and a zero cost HDHP option with a significant HSA company contribution), dental and vision coverage, paid vacation and sick time, 11 paid holidays, flexible spending and dependent care accounts, paid parental leave, disability and life insurance, and a 401(k) retirement plan with company match. Additional perks include subsidized EV charging, onsite fitness centers (where available), discounted gym memberships, complimentary snacks and beverages, 50% employee discount on our popular merch store, and a variety of other employee discounts. 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. Total Compensation (base and equity) $110,875 — $168,825 USD Base Salary $100,800 — $151,200 USD 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.

Stage Fluids Engineer II

The posting, in Rocket Lab's own words

WHAT YOU’LL GET TO DO:

YOU’LL BRING THESE QUALIFICATIONS:

THESE QUALIFICATIONS WOULD BE NICE TO HAVE:

FOR CANDIDATES SEEKING TO WORK IN US OFFICES ONLY:

FOR CANDIDATES SEEKING TO WORK IN NEW ZEALAND OFFICES ONLY: