# Dian(Ellen) Dong > Jr. Manufacturing Engineer at COFAN USA Location: Berkeley, California, United States Profile: https://flows.cv/dianellen • Strong skills in 3-D modeling, FEA, Precision Manufacturing (Keywords: Stress analysis, ANSYS, Computer Aided Design, Solid Works) • Strong understanding of mechanical engineering principles (Keywords: Packaging Design, mechanics, and material science concepts and techniques) • Various experiences in Customer Service, Negotiating with Vendors. • General knowledge of management and business (Keywords: marketing researches, consumer assessment) • Outstanding communication skills with teammates, self-motivated in quick changing environment (Keywords: Mandarin, English ) ## Work Experience ### Jr. Manufacturing Engineer @ COFAN USA Jan 2014 – Present | Fremont • Familiarity with injection molding, extrusion, stamping and CNC machining. • Coordinated between customers and vendors to put the original design into mass production. • Negotiated with multiple vendors to determine the best deals for items per specific order. ### Simulation Engineer @ DMG MORI USA Jan 2014 – Jan 2014 | Davis, CA • Familiarity with various CNC machine centers. • Created the machine 3D models for verification and simulation. • Modified and assembled machine models using SolidEdge and Vega. • Verify the performance of machine models. ### Product Designer @ Samsung Electronics Jan 2013 – Jan 2014 | UC Berkeley • Generated 20 ideas based on the interviews and observations. • Prototyped top 3 concepts for further market research and customer survey. ### Mechanical Engineer @ UC Berkeley Jan 2013 – Jan 2013 • Designed the mold of a small-volume plastic gear for a running robot. Gained hands-on experience in 3D printing and micromachining. • Hand casted the mold of the gears using silicone. • Familiarity with injection molding method to make well-toleranced gears. • Designed the metrology process to evaluate the quality of the gears. • Designed and machined a base part for the metrology process to evaluate the quality of the gears. ### Product Designer @ UC Berkeley Jan 2013 – Jan 2013 • Generate 20 ideas based on the analysis of the interviews and observations. • Designed the ergonomic laptop case using Solidworks. • Built the medium fidelity prototype of the case using Laser Cutting with acrylic. ### Researcher @ Explosion Laboratory in DUT Jan 2013 – Jan 2013 • Investigated on sealing performance of bolted flange system at high temperature. • Conducted ANSYS simulation on the sealing performance of flange system, gained the skills of 3-D modeling in ANSYS, got familiar with FEA method. • Analyzed the gasket stress of the model under the combined application of internal pressure and different steady state thermal loading. • Identified the deformation effect of the bolt elastic interaction under hot bolting with pressure. ### Project Leader @ Dalian University of Technology Jan 2011 – Jan 2013 • Took responsibilities in researching on standards of API520 and API521, determined the relief requirements of gas or vapor, steam and liquid. • Created a flow diagram of a program for overpressure relief which can calculate the relief area, relief caliber and overpressure relief quantity. • Demonstrated cut down 20% time in choosing the right safety devices ### Mechanical Designer @ Dalian University of Technology Jan 2012 – Jan 2012 • Designed the distribution of the transmission ratio of the reducer according to the efficiency of the electric motor. • Calculated the power, torque, speed, efficiency of the gears and strength of the transmission belt. • Determined the diameter of the shaft, selected the couplings and bearings based on the strength and endurance. • Adjusted the size based on the sketch, and drew the detail drawings on A1 graph paper. ### Mechanical Designer @ Dalian University of Technology Jan 2012 – Jan 2012 • Gained experience in materials selection based on material properties. Calculated wall thickness of the tank and shell cover. • Computed the axial stress caused by different loads. • Checked the strength, stability and the hydrostatic testing stress of the dangerous section of the tank and the skirt. • Finished the assembly drawing of the ethane rectification tower using AutoCAD. ### Mechanical Design Engineer @ Dalian University of Technology Jan 2011 – Jan 2011 • Took responsibility in mechanical design. Designed CAD model of MESG measuring device based on off-shelf parts. • Purchased customized parts and assembled the device. • Conducted experiments by regulating the device to obtain the MESG value of the C3H8/Air premix gas with certain concentration to test the safety and accuracy of the device ### Mechanical Technician @ China National Petroleum Corporation Dalian Branch Jan 2011 – Jan 2011 • Got familiar with the separation process of the air and the nitrogen gas. ### Mechanical Technician @ Engineering Training at The Factory Base of DUT Jan 2010 – Jan 2010 • Machined and assembled a hammer using Al-6068. • Gained hands-on experience in file, lathe, polishing processing, metallic spot welding. • Familiar with CNC mill and lathe application, surface treatment. ## Education ### Master of Engineering (MEng) in Mechanical Engineering University of California, Berkeley ### Bachelor of Science (B.S.) in Process Equipment and Control Engineering Dalian University of Technology ## Contact & Social - LinkedIn: https://linkedin.com/in/dian-ellen-dong-79b7606a --- Source: https://flows.cv/dianellen JSON Resume: https://flows.cv/dianellen/resume.json Last updated: 2026-04-13