Mechanical Engineer Designer Jobs in Riverside, CA

We're looking for a Mechanical Engineer to help design and integrate complex mechanical and electromechanical systems powering next-generation hardware-spanning positioning, propulsion, environmental control, and energy management.

This role supports high-performance systems across aerospace, transportation, robotics, and advanced mobility. If you enjoy building real hardware, collaborating across disciplines, and turning requirements into production-ready designs, you'll feel right at home.

This is a hands-on, highly collaborative position focused on developing production-intent hardware. You'll contribute to subsystem architecture, own components and subassemblies, and support programs from concept validation production release.

Why This Role Matters:

You'll be directly involved in designing the mechanical building blocks that make complex systems work-helping ensure performance, reliability, manufacturability, and cost targets are met.

You will:

• Contribute to mechanical system design and integration across multi-domain programs.
• Own components or subassemblies from concept through production release (with guidance as needed).
• Design and develop mechanical/electromechanical assemblies using Siemens NX (required).
• Apply DFM, DFA, and DFC principles throughout development to set designs up for scale.
• Create production-ready drawings with clear documentation and correct GD&T.
• Collaborate with suppliers and manufacturing teams to support part bring-up, first article builds, and early production.
• Support inspection planning and build a working understanding of IQC, OQC, tolerance stack-up, and production validation fundamentals.
• Participate in prototype builds, testing, root-cause investigations, and design refinements.
• Perform mechanical analysis such as FEA, tolerance analysis, and basic thermal/structural evaluations.
• Participate in design reviews and support system-level performance, reliability, and cost goals.
• Provide hands-on support during assembly, integration, and testing-staying close to the hardware.

What you'll Bring:

• Minimum of 4 years of experience developing mechanical products
• Bachelor's degree in Mechanical Engineering or related field preferred; relevant professional experience may be accepted in lieu of a degree
• Proficiency in Siemens NX (required).
• Strong working knowledge of GD&T and drawing release practices.
• Experience supporting parts from prototype through production release.
• Experience with multiple manufacturing processes, such as:

• Sheet metal fabrication
• Die casting
• High-precision machining
• Injection molding or similar scalable processes

• Experience collaborating with suppliers and manufacturing teams.
• Working knowledge of quality fundamentals including inspection processes and basic SPC concepts.
• Strong communication skills and ability to work effectively in cross-functional teams.

• You execute and deliver-you like finishing work that becomes real hardware.
• Strong fundamentals and practical problem-solving skills.
• Comfortable working hands-on in lab and production
• Eager to learn, level up, and take on more ownership over time.
• Able to balance performance, manufacturability, reliability, and cost within a defined scope.
• Collaborative mindset with systems awareness and ownership of assigned work.

Preferred Experience

• Aerospace or aviation systems exposure.
• Experience in high-performance, fast-iteration environments (automotive, consumer hardware, robotics, etc.).
• Familiarity with environmental testing standards such as DO-160.
• MATLAB or Python for basic analysis/automation.
• Exposure to electric or hybrid propulsion systems.

Why Join Us:

• Work alongside elite engineering talent and innovators from across aerospace and tech.
• Be part of a team moving faster than the industry standard.
• Shape solutions that are lower-cost, autonomous, and scalable - the future of aviation.
• Competitive compensation, including equity participation, growth opportunities, and full heath benefits (health, vision, dental, 401K) designed to support you in and out of work.