Senior Aerospace Mechanical Design Engineer - Onsite

Sincerus Solutions; El Segundo (CA); On-site; USD 90,000 - 140,000; Full time

Job summary

Sincerus Solutions in El Segundo, CA is seeking a Mechanical Design Engineer to own the development of flight-critical mechanical hardware from concept through qualification and production handoff. You will translate complex requirements into practical designs and lead multi-disciplinary development tasks.

The role requires hands-on engineering, strong first-principles knowledge, and experience with aerospace hardware, GD&T, and DFMA principles. On-site in El Segundo five days a week is required.

Qualifications

• Bachelor's degree or higher in Mechanical Engineering, Aerospace Engineering, Manufacturing Engineering, Materials Engineering, Engineering Physics, or a related engineering discipline.
• 4+ years of professional mechanical engineering experience, with 5+ years strongly preferred.
• Experience designing, analyzing, building, and/or testing mechanical hardware or systems.
• Strong understanding of engineering first principles, particularly solid mechanics, fluid dynamics, thermodynamics, materials, and mechanical design.
• Demonstrated experience taking mechanical hardware from concept through detailed design, prototyping, testing, and/or production.
• Experience creating production-ready engineering drawings and applying GD&T.
• Strong CAD skills with experience developing complex parts and assemblies.
• Ability to independently troubleshoot mechanical systems and drive technical problems through root cause and corrective action.
• Strong written and verbal communication skills with the ability to communicate technical concepts across engineering, manufacturing, suppliers, and customers.

Responsibilities

• Own the design and development of mechanical and electromechanical hardware from concept through qualification and production handoff.
• Develop high-reliability, manufacturable aerospace hardware including avionics components such as buttons, switches, and dials; flow-control devices such as valves, regulators, and solenoids; and mechanical mechanisms including actuators, pistons, and related assemblies.
• Translate customer and system-level requirements into practical mechanical designs while identifying opportunities to simplify requirements, reduce complexity, and accelerate hardware development.
• Lead concept development, detailed mechanical design, engineering analysis, prototyping, and first-unit builds.
• Generate and maintain detailed engineering drawings, component specifications, tolerance analyses, technical calculations, risk assessments, and supporting design documentation.
• Apply GD&T and sound tolerance practices to ensure designs meet functional, manufacturing, inspection, and assembly requirements.
• Perform engineering analysis using first principles and appropriate simulation tools, including structural, thermal, fluid, and finite element analysis as applicable.
• Lead root cause investigations for failures identified during development, qualification testing, manufacturing, and production.
• Develop and implement corrective actions to resolve design or manufacturing issues and prevent repeat failures.
• Serve as the technical owner and subject matter expert for assigned components and assemblies, working directly with customers, suppliers, manufacturers, and internal engineering teams to resolve technical issues.
• Design, build, and evaluate prototypes using in-house R&D and manufacturing capabilities.
• Partner with test engineering to define qualification requirements, develop test plans, evaluate results, and resolve failures identified during testing.
• Support qualification testing for demanding aerospace and defense environments, including applicable environmental, mechanical, thermal, pressure, vibration, and performance requirements.
• Work closely with manufacturing and build engineers to ensure new designs are practical to produce, assemble, inspect, and test.
• Incorporate Design for Manufacturing and Assembly (DFM/DFA) feedback into product designs.
• Support supplier selection and technical communication with external manufacturing partners.
• Drive engineering decisions and development activities across multiple disciplines while balancing performance, reliability, manufacturability, schedule, and cost.
• Contribute to the development and continuous improvement of mechanical design, analysis, qualification, documentation, and testing standards.
• Provide technical guidance and design-review support to other engineers while maintaining direct ownership of assigned hardware.

Skills

Solid mechanics

GD&T

CAD

Root cause analysis

Communication

Education

Bachelor's degree in Mechanical Engineering or related field

Tools

Siemens NX

CAD software

FEA software

Job description

Sincerus Solutions in El Segundo, CA is seeking a Mechanical Design Engineer to own the development of flight-critical mechanical hardware from concept through qualification and production handoff. You will translate complex requirements into practical designs and lead multi-disciplinary development tasks.

The role requires hands-on engineering, strong first-principles knowledge, and experience with aerospace hardware, GD&T, and DFMA principles. On-site in El Segundo five days a week is required.