Propulsion Engineer I (Spacecraft Engine Team)

Firefly Aerospace; Cedar Park (TX); On-site; USD 120,000 - 170,000; Full time

Benefits offered by this job

Health benefits

Relocation benefits

Educational reimbursement

Flexible PTO

Job summary

Firefly Aerospace in Texas is hiring a Propulsion Engineer II to join the Spectre Engine team. You will develop hypergol engines for the Blue Ghost program, tackling design, analysis, manufacturing, testing, and operations with a multi-disciplinary team.

You will own projects, lead critical decisions, and demonstrate a passion for solving complex propulsion challenges in a fast-paced environment. The role emphasizes hands-on development, test infrastructure, and collaboration with structures,

Qualifications

• BS in Aerospace Engineering or related engineering discipline.
• 3+ years of experience on an aerospace engine or fluid system.
• Strong fundamentals in fluids, thermodynamics, and mechanics.
• Experience with Siemens NX or equivalent CAD.
• Understanding tolerancing, ASME/ASTM standards, and GD&T.
• Ability to work effectively in a multi-disciplinary team and provide technical guidance.

Responsibilities

• Serve as Responsible Engineer for in-space propulsion hardware including main and attitude control engines, valves, and propellant tanks.
• Develop new design concepts for propulsion integration that reduce complexity and increase reliability while staying within budget.
• Assist in development of manufacturing, integration, and test processes and create work instructions and test procedures.
• Act as primary contact for design, analysis, and operations of spacecraft fluid systems.
• Perform flight operations as a primary operator for fluids and propulsion systems.
• Own and execute development, qualification, and acceptance testing of flight hardware.
• Implement design for manufacturability changes to improve production efficiency and vehicle reliability.
• Identify system risks and conduct trade studies to ensure successful operation.
• Drive development of automation and test data analysis tools.

Skills

Strong engineering fundamentals in Flu

Multi-disciplinary teamwork

Tolerancing and GD&T

Education

BS in Aerospace Engineering or related engineering discipline

Tools

Siemens NX

Job description

ABOUT FIREFLY AEROSPACE

Firefly 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.

About the Role

The position of Propulsion Engineer II within the Spectre Engine team at Firefly involves leveraging creativity, ingenuity, and experience to develop hypergol engines for our Blue Ghost program. Engineers tackle complex challenges throughout the project life cycle, from design and analysis to manufacturing, testing, and operational support. Collaborating closely with other product groups, such as structures, fluid systems, and avionics, Propulsion Engineers take ownership of projects and make critical decisions. Successful candidates will demonstrate a passion for solving challenging problems, the ability to synthesize information, and a determination to create leading-edge propulsion systems in a dynamic, fast-paced environment.

Responsibilities

• Serve as Responsible Engineer for in-space propulsion hardware including main and attitude control engines, valves, and propellant tanks.
• Develop new and innovative design concepts for propulsion integration and operations that reduce complexity and maximize reliability within budget
• Assist in the development of manufacturing, integration, and test processes, including work instructions, test procedures, development testing, and initial build support
• Act as the primary point of contact for design, analysis, and operations of spacecraft fluid systems
• Perform flight operations as a primary operator for fluids and propulsion systems
• Own and execute development, qualification, and acceptance testing of flight hardware
• Execute design for manufacturability changes to enhance production efficiency and vehicle reliability
• Identify system risks and conduct corresponding trade studies to ensure successful vehicle operation
• Drive development of automation and test data analysis tools

Qualifications

Required

• BS in Aerospace Engineering or related engineering discipline.
• 3+ years of experience working on an aerospace engine or fluid system
• Strong engineering fundamentals in fluids, thermodynamics, and mechanics
• Experience in Siemens NX or equivalent CAD program
• Comprehension of design fundamentals including tolerancing, ASME Standards, ASTM, and GD&T
• Ability to effectively work in a multi-discipline team and provide technical guidance and insight.

Desired Qualifications

• Master’s Degree in Mechanical, Aerospace, or related engineering discipline.
• 5+ years of progressive experience in related engineering discipline
• Experience with storable liquid propulsion (NTO/MMH, Hydrazine)
• Experience leading technical reviews (design & analysis) or investigations (risk, anomaly, or trade studies)
• Hands‑on experience with integrating test articles and sub‑assemblies for test or production
• Prior experience working with data acquisition systems and test instrumentation including pressure transducers, thermocouples, resistance temperature detectors, flow meters, load cells, and accelerometers
• Experience with end to end ownership of technical projects from conception to delivery
• Strong interpersonal and organizational skills

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.