Additive Welding Engineer Long , California,

At Relativity Space, we’re building rockets to serve today’s needs and tomorrow’s breakthroughs. Our Terran R vehicle will deliver customer payloads to orbit, meeting the growing demand for launch capacity. But that’s just the start. Achieving commercial success with Terran R will unlock new opportunities to advance science, exploration, and innovation, pioneering progress that reaches beyondthe known.

Joining Relativity means becoming part of something where autonomy, ownership, and impact exist at every level. Here, you're not just executing tasks; you're solving problems that haven’t been solved before, helping develop a rocket, a factory, and a business from the ground up. Whether you’re in propulsion, manufacturing, software, avionics, or a corporate function, you’ll collaborate across teams, shape decisions, and see your work come to life in record time.

Relativity is a place where creativity and technical rigor go hand in hand, and your voice will help define the stories we’re writing together. Nowis a unique moment in time where it’s early enough to leave your mark on the product, the process, andthe culture, but far enough along that Terran R is tangible and picking up momentum. The most meaningful work of your career is waiting.

Join us.

Relativity Space pioneered large-scale additive manufacturing with our Terran 1 rocket, the largest 3D-printed object to fly. Now a distinct business unit within Relativity, Horizon Manufacturing Technologies is advancing next-generation manufacturing for aerospace and beyond. The team operates at the frontier of manufacturing innovation, where creativity meets capability. This is an environment where cutting-edge R&D is put into production, industrializing advanced manufacturing capabilities to solve customer problems.

You’ll work alongside welders, robotics engineers, data scientists, and systems engineers at the intersection of hardware and software, creating an end-to-end additive manufacturing platform that serves a wide variety of applications. From exploring new materials to unlocking faster print speeds, to designing complex, organic geometries that can’t be built any other way, it’s high-impact work that sets the foundation for the future of advanced manufacturing.

• Lead the industrialization of additive weld technologies, translating development capabilities into robust, repeatable, and production-ready manufacturing processes for flight hardware.
• Own the technical transition from development to production, establishing the process architecture, controls, qualification strategy, and manufacturing readiness required to realize new technologies at scale.
• Define and implement data-driven process control strategies, including process baselines, control limits, variation studies, and statistical methods to establish stable, capable, and repeatable production processes.
• Serve as a technical authority for additive welding and manufacturing, guiding cross-functional teams through complex processes, equipment, materials, and production challenges while establishing the technical direction for next-generation capabilities.
• Lead technology maturation and integration, identifying promising development technologies and driving their evaluation, qualification, and deployment into production manufacturing systems.
• Establish scalable pathways from innovation to production, balancing technical performance, manufacturability, reliability, automation, and operational requirements to accelerate adoption of new additive manufacturing capabilities.
• Influence cross-functional engineering development teams, aligning development priorities with product requirements and ensuring emerging technologies deliver measurable improvements to production capability, quality, and performance.

• 5+ years of hands‑on experience with Gas Metal Arc Welding (GMAW) Additive Manufacturing.
• Proven experience working with robotic welding systems and a working knowledge of industrial automation and control integration.
• A sharp attention to detail and a drive to push technologies beyond their current limits.
• Strong analytical and problem‑solving skills with a…