Mechanical Engineer - Build

Location

El Segundo, CA

Wage

$125,000 – $175,000/yr

Employment Type

Full-time

Apply for This Position

Posted on August 27, 2026

Job Description

Overview

The Mechanical Engineer - Build role involves owning the full mechanical build of Poseidon robotic systems, developing new production processes, and ensuring quality and reliability in assembly. This hands-on position requires collaboration with design engineers and technicians to improve production efficiency and reliability in challenging maritime environments.

Responsibilities

  • Own the full mechanical build of Poseidon robotic systems from start to finish.
  • Develop new processes for production required by new product development.
  • Assemble, integrate, and debug electro-mechanical subsystems including actuators, motors, PCBs, plumbing, and structural assemblies.
  • Identify design issues during build and work with the design team to implement improvements.
  • Build fixtures, tools, and processes to enhance assembly speed and reliability.
  • Diagnose failures quickly through teardown, root-cause analysis, and hands-on testing.
  • Ensure every Poseidon unit meets quality, fit, alignment, and performance standards before deployment.
  • Collaborate with technicians and engineers to improve subsystem repeatability.
  • Maintain build documentation, assembly procedures, and checklists as systems evolve.
  • Help plan and execute build infrastructure and processes to triple robot production in 2026.
  • Work closely with design engineers to influence new revisions based on build-floor feedback.

Requirements

  • 1+ years of hands-on experience assembling or building electro-mechanical hardware; 3+ years preferred.
  • Ability to read and produce CAD models, mechanical drawings, and specifications.
  • Strong mechanical intuition with the ability to diagnose issues and propose fixes quickly.
  • High proficiency with power tools, hand tools, and standard shop equipment.
  • Comfortable owning tasks independently and driving work to completion.
  • Strong communication skills and ability to work closely with design engineers and technicians.
  • Experience with build documentation or writing clear assembly instructions.
  • Willingness to travel occasionally to fishing sites and work with the field engineering team.

Additional Information

  • Expect to work long hours outside of standard business hours, including early mornings, evenings, and weekends.
  • This is a highly hands-on engineering role focused on building hardware for harsh maritime environments.
  • You will be the primary owner of Poseidon system build reliability and drive the pace the company needs.

How this job compares in El Segundo, CA

Pay in context

At roughly $72/hr, this posting sits about 90% above the $38/hr median for welding jobs in El Segundo, CA — toward the top of a $38–$40/hr middle band drawn from 12 postings with published pay. Put another way, it pays more than about 92% of the comparable postings we have wage data for. Pay that far above local median usually comes attached to something: a harder cert requirement, travel, night shift, or overtime that isn't really optional. Worth establishing which before you accept.

The local market in El Segundo, CA

We're tracking 13 other active welding openings in El Segundo, CA right now, from 5 different employers. 12 of them were added in the last week. Across California as a whole we're tracking 596 other active welding openings from 293 employers. A metro this active generally means you have real leverage — employers here are competing for the same welders. Browse every welding job in El Segundo, or widen the search to California.

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 $65/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 El Segundo, CA

Pay figures are medians computed from live postings in the Welding Pros index, not from survey data, and they move as employers post. Mechanical Engineer - Build figures were last recalculated when this page was built.