ASME Welding Technician

ASME Welding Technician - Build High-Performance Energy Systems

Hawthorne, CA | On-site

Join a well-funded, early-stage energy technology startup developing advanced power generation systems. The company is building compact, high-performance turbine technology designed to deliver reliable power across a range of energy applications.

We are looking for an experienced ASME Welding Technician to support the fabrication and assembly of high-pressure, high-temperature mechanical systems. You will work directly with mechanical, fluid systems, and test engineers to fabricate pressure-rated piping, structural assemblies, and critical hardware used in the development and testing of next-generation energy technology. This is a hands-on role for someone who takes pride in producing high-quality welds and working on complex hardware.

You will have significant ownership over fabrication work, from interpreting engineering drawings and preparing materials through welding, inspection, and final assembly.

We are a venture-backed energy technology startup developing advanced thermal and power generation systems for industrial and emerging energy markets. Our team combines mechanical engineering, fluid systems, controls, and hardware testing to develop compact, scalable power solutions. Based in Hawthorne, California, we are building and testing our next generation of hardware with a small, highly technical team.

• Fabricate and weld high-pressure piping, pressure-containing components, and mechanical assemblies in accordance with applicable ASME codes and qualified welding procedures.
• Perform precision GTAW (TIG) welding on stainless steel, nickel-based alloys, and carbon steel, including open-root and internally purged welds.
• Interpret engineering drawings, piping isometrics, and weld symbols to prepare, fit, and assemble components for welding.
• Perform material preparation, joint beveling, cleaning, fit-up, and fixturing to ensure weld quality and dimensional accuracy.
• Monitor welding parameters, heat input, and interpass temperatures to maintain weld integrity and compliance with applicable procedures.
• Fabricate structural frames, equipment skids, mounting brackets, fixtures, and other hardware used in system development and testing.
• Support weld inspections and nondestructive examination, including visual inspection, liquid penetrant testing, and radiographic testing.
• Maintain accurate welding records, material traceability, and fabrication documentation for code-compliant assemblies.
• Work closely with engineering teams to identify fabrication challenges and recommend improvements to weld joint design, assembly methods, and manufacturability.
• Maintain welding equipment, tooling, and shop work areas to support safe and efficient fabrication activities.

• 4+ years of professional welding experience, including hands-on fabrication of ASME code-compliant components.
• Current or recent welder performance qualifications (WPQ) in accordance with ASME Section IX.
• Strong proficiency in GTAW (TIG) welding of stainless steel and high-alloy materials.
• Experience fabricating pressure piping, pressure vessels, or other pressure-containing hardware in accordance with ASME B31.1, B31.3, or Section VIII.
• Ability to interpret mechanical drawings, piping isometrics, welding symbols, and fabrication specifications.
• Experience preparing and executing welds using qualified welding procedure specifications (WPS).
• Proficiency with common fabrication techniques, including cutting, grinding, joint preparation, fit-up, and basic machining.
• Working knowledge of welding safety practices, material handling, and quality requirements for pressure-rated hardware.

• Experience welding…