Senior Mechanical Engineer Jobs in California

354 open Senior Mechanical Engineer jobs in California at 87 companies, including SpaceX, Cisco and Microsoft. Updated daily from company career pages.

SpaceX

SpaceX is an aviation and aerospace company that focuses on reducing the costs associated with space travel by using reusable rockets.

8 more open roles at SpaceX

Cisco

Cisco develops, manufactures, and sells networking hardware, telecommunications equipment, and other technology services and products.

Microsoft

DoorDash

DoorDash is a food delivery platform that connects customers with local and national business.

Qualcomm

Qualcomm designs, manufactures, and markets digital wireless telecommunications products and services.

Midjourney

Midjourney is a non-profit research lab that is investigating new thought mediums to improve the human species' inventive abilities.

Micron Technology

Micron Technology is a semiconductor company that produces DRAM, SDRAM, flash memory, SSD and CMOS image sensing chips.

Anduril Industries

Anduril Industries is a defense product company that builds technology for military agencies and border surveillance.

63 more open roles at Anduril Industries

ResMed

A global leader in digital health and connected medical devices, plus software solutions that support out-of-hospital care providers.

ASML

ASML is a manufacturer of chip-making equipment.

Blue Origin

Blue Origin is an aerospace company that focuses on lowering the cost of spaceflight and helping to explore the solar system.

25 more open roles at Blue Origin

Vast

Vast offers decision-making tools that help and support customers in purchasing homes, cars, and vacations.

9 more open roles at Vast

Booz Allen Hamilton

Booz Allen Hamilton is a consulting firm that specializes in analytics, technology, and engineering.

Span

Span develops residential energy storage devices that provide renewable electricity and charging services for electric vehicles.

Kla

Kla creates tools and services that promote innovation in the electronics industry.

14 more open roles at Kla

Carbon

Carbon is a company that provides high-tech, waste reducing 3D printing services.

Rocket Lab

Rocket Lab delivers a range of complete rocket systems and technologies for fast and low-cost payload deployment.

12 more open roles at Rocket Lab

Shield AI

Shield AI is an artificial intelligence company that aims to protect service members and civilians with intelligent systems.

Penumbra

Penumbra develops clinically beneficial products that help patients suffering from stroke and other neurovascular diseases.

Relativity Space

Relativity Space is an aerospace company that designs, develops, and builds 3D printed rockets.

19 more open roles at Relativity Space

Updated 2026-10-10.