Fluids Engineer II

Firefly Aerospace; Bertram (TX); On-site; USD 85,000 - 110,000; Full time

Job summary

Firefly Aerospace, based in Texas, is seeking a Fluids Ground Support Equipment (FGSE) Engineer to own the full lifecycle of fluid systems at launch sites and test stands. You will design, analyze, and build incompressible, cryogenic, and high-pressure gas systems and collaborate with technicians and cross-functional teams.

This role requires a Bachelor’s in mechanical or aerospace engineering, 2–5 years in fluid systems, and willingness to travel up to 30% to support GSE builds and activations.

Qualifications

• Bachelor’s degree in mechanical or aerospace engineering.
• 2–5 years in fluid systems, pneumatics, hydraulics, or HVAC design, assembly, test or operations.
• Solid understanding of fluid dynamics and thermodynamics.
• Experience with valves, regulators, instrumentation, and pressurized components.
• Willingness to travel up to 30% for GSE build and activation.

Responsibilities

• Design, analyze, and build test stand and launch pad fluid systems, including incompressible, cryogenic, and high-pressure gas systems.
• Own the full design cycle: schematics, P&IDs, BOMs, CAD drawings, and procurement.
• Work with technicians and welders to implement designs and fix real-world problems.
• Lead internal and external design reviews and readiness reviews for programs.
• Travel to test and launch sites as required to support builds and commissioning.

Skills

Fluid dynamics

Thermodynamics

Pneumatics & hydraulics

CAD design

Cross-functional teamwork

Project management

Education

Bachelor's degree in mechanical or aerospace engineering

Tools

Siemens NX

REFPROP

GFSSP

Job description

ABOUT FIREFLY AEROSPACEFirefly Aerospace is a space and defense technology company that enables our world to launch, land, and operate in space – anywhere, anytime. As the partner of choice for critical space missions, Firefly is the only commercial company to launch a satellite to orbit with 24-hour notice and the only company to achieve a successful Moon landing. Our launch vehicles, lunar landers, and orbital vehicles provide government and commercial customers with full mission services from low Earth orbit to the Moon and beyond. Headquartered in north Austin, Texas, Firefly is looking for passionate, hardworking innovators to join our team and help fuel our successful trajectory into space.SUMMARYAs a Fluids Ground Support Equipment (FGSE) Engineer at Firefly, you'll own the complete lifecycle of critical fluid systems at our launch sites, test stands, and production facilities. You'll work in a dynamic and collaborative environment designing and building large complex fluid systems, including incompressible, cryogenics, propellants, and high-pressure gas systems. You’ll be solving real-world problems in real-time alongside skilled technicians, welders, and cross-functional teams. From architecture trades and detailed designs through fabrication, installation, and activation, you'll be the technical decision-maker ensuring Firefly's launch sites and test stands meet the current and future needs for each of Firefly’s programs.This role offers exposure across Firefly's entire fleet - Alpha, Eclipse, Elytra, and Blue Ghost - giving you an unparalleled breadth of experiences and challenges as you help define the next generation of test and launch infrastructure.RESPONSIBILITIESDesign, analyze, and build test stand and launch pad fluid systems, including incompressible, cryogenic, and high-pressure gas systemsOwn the full design cycle of your fluid systems, including generating schematics and P&IDs, sizing components, generating BOMs, creating CAD, procuring hardware, and generating drawingsWork directly with technicians and welders to schedule, prepare, and build your designs and fix real-world problemsParticipate in and lead internal design reviews, operational readiness reviews, and represent Firefly during external design reviewsTravel to test and launch sites, as required, to support build and commissioning of new and upgraded fluid systemQUALIFICATIONSRequiredBachelor’s degree in mechanical engineering, aerospace engineering, or equivalent2-5 years of recent experience in a professional setting outside the classroom with fluid systems, pneumatics, hydraulics, or HVAC systems in a design, assembly, test, or operations capacityThorough understanding of fluid dynamics and thermodynamicsSolid understanding of fluid components such as valves, regulators, pressure transducers, tubing, tanks, pressurized hardware, seals, and instrumentationExperience with fluid system subcomponent or pressurized component development, design, or testing (such as valves, regulators, piping systems, pumps, etc..)Working knowledge of manufacturing, fabrication, integration & quality control relevant to fluid components (such as machining, inspection, welding, assembly, testing, etc.)Demonstrated ability to do clean sheet designs of pressurization systems, propellant systems, or other complex multidisciplinary systemsExperience creating P&IDs, performing fluid system sizing, fluid component and instrumentation selection, and pressurized system designExperience using fluids analysis tools such as REFPROP, GFSSP or other computer-based fluid dynamic modelingProficient with 3D & 2D CAD software packages such as Siemens NXCapable of balancing detailed design tasks with higher level project management style tasks, including budgeting, scheduling, and communicationsAble to travel in support of GSE build and activation up to 30% of the timeDesiredAdvanced degree in mechanical, aerospace, or equivalent fieldDirect hands-on experience building, troubleshooting, and/or operating complex fluid or mechanical systemsCryogenic system design and/or operational experienceHypergolic system design and/or operational experienceExperience working in an aerospace, R&D, or oil & gas environment.Familiarity with ASME, NASA, and AFSPCMAN standards related to fluid system design, such as ASME B31.3, ASME BPVC Section VIII, and/or AFSPCMAN 91-710Direct experience with design and build of ground systems (GSE) or related fluid systems including, but not limited to test environments, fluid or gas conditioning/storage, manufacturing processes, and compressible gasesPrimary Level Salary Range:Firefly offers outstanding benefits for our employees, including generous health, dental and vision plans with low plan deductibles, parental leave, relocation benefits, educational reimbursement, short term disability, and flexible PTO options.To conform to U.S. Government space technology export regulations, including the International Traffic in Arms Regulations (ITAR) you must be a U.S. citizen, lawful permanent resident of the U.S., protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. Department of State.Firefly Aerospace, Inc. is an Equal Opportunity Employer; employment with Firefly is governed based on merit, competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.