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Job Description

Overview

Castelion is seeking a detail-oriented and highly motivated R&D Technician focused on structural welding to join their manufacturing team. The role involves supporting the design, setup, execution, and documentation of GSE/Test article fabrication, as well as collaborating with engineering teams to ensure products meet performance and safety standards.

Responsibilities

  • Work with a team of technicians responsible for fabrication, assembly, and modification of Flight, GSE and Test articles.
  • Execute on the welding and assembly of GSE, flight articles, and test fixtures.
  • Assemble, service, and operate hydraulic actuation systems.
  • Interpret drawings and engineering specifications for fabricating structural steel weldments and aerospace flight assemblies.
  • Collaborate with engineers to refine designs and procedures.
  • Support root cause analysis and continuous improvement efforts.

Requirements

  • High school diploma or equivalency certificate.
  • 5+ years experience in structural welding.
  • 3+ years of hands-on mechanical experience in testing aerospace/automotive systems, maintenance/troubleshooting complex mechanical systems, or fabrication/assembly of complex electromechanical systems.
  • Ability to stand for extended periods.
  • Ability to lift up to 50lbs.
  • Ability to walk throughout the facility and on uneven terrain.
  • Ability to climb ladders and in and out of motor vehicles.
  • Ability to perform repetitive motions with hands and arms.
  • Ability to work outdoors in both hot and cold climates.

Benefits

  • Health Insurance
  • Dental
  • Vision
  • PTO

Benefits

Health Insurance
Dental
Vision
PTO
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How this job compares in Torrance, CA

Pay in context

This employer didn't publish a rate. For reference, welding jobs in Torrance, CA currently run a median of $33/hr in our index, with the middle half of them falling between $27–$45/hr across 25 postings with published pay. That median is a reasonable floor to anchor on when a recruiter asks what you're looking for.

The local market in Torrance, CA

We're tracking 46 other active welding openings in Torrance, CA right now, from 17 different employers. 11 of them were added in the last week. Across California as a whole we're tracking 577 other active welding openings from 282 employers. A metro this active generally means you have real leverage — employers here are competing for the same welders. Browse every welding job in Torrance, or widen the search to California.

Castelion currently has 4 other openings live in California, which is usually a sign of either steady growth or steady turnover — worth asking which in the interview.

The most active employers in California at the moment, by number of open welding reqs, are SpaceX (34), Aerotek (16), and Volt (16). Volume like that usually means either a genuine expansion or a staffing agency working several client sites — worth knowing which before you apply.

Within California, the best-paying metros we track by median hourly rate are Redondo Beach at $71/hr, Long Beach at $49/hr, and Santa Ana at $48/hr. If you can relocate or commute, that spread is worth factoring in.

Similar openings near Torrance, CA

Pay figures are medians computed from live postings in the Welding Pros index, not from survey data, and they move as employers post. R&D Technician – Structural Welding figures were last recalculated when this page was built.