Propulsion Engineer II - Engine Design

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 Alpha Engines team is responsible for the design, integration, and operation of the Reaver and Lightning engines that power the first and second stages of Firefly’s Alpha launch vehicle.

As a Design Engineer for Alpha Engines, you will own the CAD of the large engine assemblies, manage configuration and revision control, develop and implement proper design standards and processes, assist the team with translating the design intent of their hardware into producible, well-toleranced models and drawings, and be the team’s go-to expert for CAD and GD&T.This role requires expert command of CAD and GD&T, meticulous attention to detail, extreme ownership of the design data that drives manufacturing and inspection, and clear communication with cross-functional partners including propulsion, systems, production, and quality.

The successful candidate will be a self-starter who enjoys challenging assumptions, thrives in a fast-paced development environment, and seeks to make impactful contributions to Firefly’s mission.

Responsibilities Own and manage the CAD models and large, multi-level assemblies for Alpha engine hardware, maintaining assembly structure, mates, and configuration integrity as the design matures

Create, release, and review detailed manufacturing drawings with appropriate GD&T that properly communicates design intent per ASME Y14.5

Analyze tolerance stackups across assemblies

Establish and enforce CAD best practices, modeling standards, templates, and assembly structures that keep large assemblies robust, performant, and maintainable

Manage configuration, revision, and change control of models, drawings, and bills of materials within the PLM system, including release workflows

Collaborate with manufacturing, quality, and suppliers to ensure drawings are manufacturable and inspectable, and support disposition of non-conformances

Support design reviews with up-to-date model and drawing deliverables

Lead development of design concepts that reduce part count, complexity, cost, and lead time while preserving design intent and maximizing reliability

Provide hands-on CAD and GD&T support to the broader Alpha Engines team

Qualifications

RequiredB.S. in Mechanical, Aerospace, or a related engineering discipline, or equivalent design and drafting experience1-3 years of experience in mechanical design of hardware

Expert proficiency with 3D CAD, including the modeling and management of large, complex assemblies (Siemens NX strongly preferred)
Strong command of GD&T, tolerancing, and ASME Y14.5, and the ability to produce complete, manufacturable, and inspectable engineering drawings

Experience with PLM and configuration management tools (Teamcenter preferred), including formal revision and change control

Experience performing tolerance stackups and fit, clearance, and interference analysis across assemblies

Working knowledge of manufacturing and inspection methods (precision machining, castings/forgings, additive manufacturing, welding, sheet metal, assembly, and NDT) and design for…