Propulsion Manufacturing Engineer III

Firefly Aerospace

Lead Manufacturing Engineer for propulsion systems at Firefly Aerospace in Briggs, TX. Transition products from development to production with end-to-end fabrication and assembly ownership.

Posted 6/19/2026full-timeBriggs • Texas • 🇺🇸 United StatesSeniorLeadWebsite

Tech Stack

Tools & technologies

AssemblyPython

About the role

Key responsibilities & impact

Lead the transition of products from development to production
End to end ownership of the fabrication, assembly, and check out procedures for propulsion subassemblies and full up engines.
Continuous process development and improvement with the aim of radically increasing production rate and substantially reducing cost.
Lead investigations of process failures and drive to root cause.
Own the development, test, and qualification of new production processes.
Participate in design reviews and provide feedback to the design teams.
Own the assembly and integration instructions and work with technician teams towards continuous improvement.
Develop and execute functional checkout procedures and processes where applicable.
Disposition non-conformances that occur throughout the build process, develop and implement corrective actions
Conduct manufacturability reviews and implement design improvements

Requirements

What you’ll need

Bachelors degree in Engineering or related technical field
8+ years of experience working in a Manufacturing Engineer role
Proven experience with complex assemblies, e.g. production in aerospace/aviation/automotive industries
Able to read and interpret technical drawings and assembly instructions
Proven experience with complex troubleshooting
Proven experience working in dynamic and evolving environments
Excellent written and verbal communication skills to convey methodologies for assembly and troubleshooting
Strong interpersonal and conflict resolution skills
Must be a team player
Proven experience with tasks requiring extreme attention to detail and prolonged mental concentration
Ability to thrive in high stakes, stressful, short deadline environments
Critical thinking and strong decision making ability
10 + years of experience in an aerospace production environment (desired)
Experience with advanced manufacturing techniques (welding, brazing, casting, additive fabrication, forging, spin forming, etc.) (desired)
Experience working with cryogenics and high-pressure pneumatics systems (desired)
Experience with modern manufacturing principles, such as Lean Manufacturing, Six Sigma, etc. (desired)
Experience with complex system assembly and hands on build experience preferably in space systems or aerospace applications (desired)
Experience with writing assembly procedures or documentation for mechanical, electrical, or structural systems (desired)
Experience writing test plans, procedures and identifying pass/fail criteria on systems (desired)
Knowledge of data analysis packages (Python/high level Excel) preferred (desired)
Working knowledge of fluid components and systems (desired)

Benefits

Comp & perks

Generous health, dental and vision plans with low plan deductibles
Parental leave
Educational reimbursement
Short-term disability
Flexible PTO options

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

manufacturing engineeringcomplex assembliestroubleshootingadvanced manufacturing techniquesLean ManufacturingSix Sigmadata analysisfluid componentsassembly procedurestest plans

Soft Skills

communication skillsinterpersonal skillsconflict resolutionteam playerattention to detailcritical thinkingdecision makingability to thrive under pressureadaptabilityproblem solving