Mechanical Design Engineer, Plant Piping Systems is open at General Matter in Los Angeles, CA. The posting gives a salary of $90K - $185K. Posted on Feb 17, 2026, and still on General Matter’s careers page when we last checked, on Nov 14, 2026.
About the role
Own the detailed mechanical design of plant piping and equipment systems, translating P&IDs and process architecture into fully engineered, constructible designs. Size and select pipe, valves, fittings, and supports from first principles based on process conditions, including flow, temperature, and pressure. Drive routing and layout decisions with process and structural partners, building configurations that are…
The opening lines of the posting. The rest is on General Matter’s careers page.
Hiring at General Matter
General Matter has 132 open roles right now. Most are in Engineering, Operations and Manufacturing & Trades. The median advertised salary across its roles with a published range is $145K. See all its roles
