Mechanical Engineer in El Segundo

Job DescriptionJob Description

Mechanical Engineer - Space-Based Interceptor Systems

El Segundo, California | On-site

Opportunity Summary

A venture-backed aerospace and defense startup is developing next- space-based interceptor systems designed to address emerging security threats. The team is building advanced flight hardware that combines propulsion, structures, controls, and integrated vehicle systems with a strong emphasis on rapid development, testing, and real-world performance. This role is focused on hands-on mechanical engineering execution across interceptor structures, packaging, prototyping, integration, and test support. The engineer will contribute directly to the development of space-based interceptor (SBI) platforms from early concepts through hardware demonstration and iterative testing. This is an execution-heavy role ideal for someone who enjoys working closely with hardware in a fast-moving engineering environment.

About Us

We are an early-stage aerospace and defense company developing advanced space-based interceptor technologies for security applications. Our team includes engineers from aerospace, propulsion, autonomy, and defense backgrounds focused on building highly capable systems through rapid iteration and aggressive hardware development. We operate with a strong engineering-first culture where ownership, execution, and collaboration are critical.

Job Duties

• Support the design and development of mechanical and structural systems for space-based interceptor platforms
• Create CAD models, assemblies, manufacturing drawings, and integration layouts
• Assist with vehicle packaging, mounting strategies, brackets, and subsystem integration
• Perform structural and mechanical analysis to support hardware reliability and survivability
• Support prototype builds, hardware integration, and assembly activities
• Participate in testing, troubleshooting, and iterative hardware improvements
• Work closely with propulsion, electrical, controls, and aerodynamic engineers during development activities
• Assist with material selection and manufacturing coordination for aerospace-grade hardware
• Interface with machine shops, fabrication vendors, and suppliers to support hardware production
• Build development fixtures, test setups, and prototype hardware as needed
• Contribute to hands-on machining, fabrication, and hardware modification efforts

Qualifications

• B.S. in Mechanical Engineering, Aerospace Engineering, or a related technical field
• 3+ years of hands-on mechanical engineering experience
• Strong CAD experience with mechanical assemblies and integration work
• Experience supporting prototype development, hardware integration, or testing
• Familiarity with structural analysis and mechanical design fundamentals
• Experience working with aerospace-grade materials and manufacturing processes
• Comfortable working directly with hardware in a fast-paced engineering environment
• Strong communication and collaboration skills across technical teams

Experience

• Experience supporting missiles, interceptors, UAVs, spacecraft, launch systems, or other aerospace hardware programs
• Hands-on machining or fabrication experience using manual or CNC equipment
• Familiarity with vibration, thermal, or environmental testing
• Experience working with external vendors and prototype manufacturing partners
• Exposure to high-performance or high-temperature mechanical systems
• Experience supporting rapid iteration hardware development programs

Why Join Us

• High ownership role with direct impact on next- space-based interceptor hardware
• Opportunity to work on advanced security systems at the intersection of space and defense
• Frequent hands-on testing, prototyping, and hardware iteration
• Small engineering team with significant technical exposure and growth opportunity
• Work closely with experienced engineers across propulsion, structures, controls, and integration

Compensation Details

$110,000 - $150,000

#LI-AV