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Juehua J.

Senior Mechanical Engineer | Six Sigma Black Belt

Shenzhen, China

Global rank:

36,328 / 155,863

Skill pts: 5

Blender CAD Design MATLAB Microsoft Excel PTC Creo Parametric

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About

Turning complex concepts into manufacturable, cost-effective products is what I do best.
As a Senior Mechanical Engineer and Six Sigma Black Belt with over 15 years of experience, I specialize in bridging the gap between R&D design and mass production. My goal is simple: to help you launch high-quality products faster and cheaper.
How I can help you:
Advanced CAD & Simulation: Proficient in Creo Parametric & Ansys (CFD/FEA) for robust product validation before you cut steel.
NPI & DFM Expert: I optimize designs for manufacturing to prevent costly mold reworks and ensure smooth assembly.
Process Improvement: Applying Six Sigma methodologies to reduce defects and streamline production workflows.
Vendor Management: Managing relationships and ensuring strict quality control during the production phase in China.
Whether you need precise 3D modeling, engineering analysis, or a partner to guide your product from prototype to the factory floor, I deliver results that save time and money.
Let's discuss how I can bring value to your project. Feel free to send me a message!

Experience

Senior Mechanical Engineer | Product Design to Mass Production | DFM Expert Self - Employed · Self-employed Aug 2023 – Present 3 yrs 3 mos China Providing expert engineering consultancy for high-tech consumer electronics and home appliances. Specializing in taking products from concept to mass production with a focus on cost-efficiency and reliability. Proficient in Creo, AutoCAD, and GD&T.
Key Projects & Achievements:
High-Speed Hair Dryers & Robot Vacuums: Led mechanical design for next-gen appliances, optimizing airflow dynamics and structural layout to enhance performance while reducing unit cost by 15%.
Six Sigma Process Optimization: Conducted root-cause analysis for client production lines, implementing DMAIC methodologies that reduced defect rates by 20% and improved yield.
Smart Appliance Integration: Oversaw the integration of Battery Management Systems (BMS) for cordless devices, ensuring thermal safety and compliance with international standards (UL/CE).
DFM & Manufacturing Support: Delivered comprehensive DFM reports for injection molding and sheet metal parts, resolving critical tooling issues before mass production.
Senior Product Development Engineer Severin · Full-time Feb 2007 – Aug 2023 16 yrs 6 mos China Spearheaded end-to-end product development for a leading global appliance manufacturer over a 16-year tenure. Managed the full lifecycle from market research and prototyping to tooling validation and mass production launch.
Major Achievements:
Cost Reduction Leader (Six Sigma Black Belt): Led a factory-wide Six Sigma initiative that saved $1.2M in operational costs and $6.8M in material costs through process optimization and waste reduction.
Product Portfolio Success: Successfully launched 20+ SKUs including commercial coffee machines, steam irons, and water boilers, generating significant annual revenue.
Tooling & Quality Assurance: Managed precision mold validation (T0-T1), resolving complex engineering challenges during EVT/DVT phases to ensure 99% first-pass yield in mass production.
Cross-Functional Leadership: Collaborated with marketing, sourcing, and manufacturing teams to deliver projects on time and under budget, consistently meeting strict European quality standards.

Education

Northeastern University Master Of Engineering, Mecahanical 1987 – 1994 Specialized in Mechanical Engineering with a focus on CAD/CAM and simulation technologies.
Gained expert-level proficiency in industry-standard tools including SolidWorks, AutoCAD, and ANSYS for 3D modeling and finite element analysis (FEA).
Completed rigorous coursework in machine design, thermodynamics, and manufacturing processes.
Applied theoretical knowledge to practical lab projects, ensuring designs met ISO/ASME standards for safety and performance.

Other experience

Lead Mechanical Engineer | Smart Robot Vacuum NPI Project Led the full-cycle mechanical design and NPI (New Product Introduction) for a commercial smart robot vacuum. Applied Six Sigma DMAIC methodology to optimize the internal structural layout, successfully resolving thermal management issues in the compact chassis and reducing motor operating temperature by 15°C. Conducted rigorous DFM/DFA reviews with injection molding suppliers, optimizing the cyclone dust separation module to prevent costly mold reworks. Streamlined the assembly process, reducing overall BOM costs by 12% and achieving a seamless transition from prototype to mass production.

Licenses & Certifications

Six Sigma Black Belt Certification TUVRheinland Dec 2011 – Present See credential