Long Doan Email & Phone Number

Greater San Diego Area

Greater San Diego Area

Design and manufacture Pan & Tilt, Motors, Resolvers, Generators, Scanners, Sensors, Control Actuators, Seekers, long range IR monitor systems for Defense Industry and high-end commercial applications.

San Diego

Represented company as print sector principal domain expert in supporting current and new business development. Directed and coached a multi-discipline team in designing, simulation analysis, validation, and launching its first high-performance Electronic duplex scanner feeder.• Bid and won manufacturing business of customer first rugged portable thermal printer. • Developed and managed multi-million dollar tooling budget• Provided direct engineering interface to the supplier base to assure parts quality and productivity.• Proposed and implemented design improvements and simplification through material research and simulation analysis• Integrated cost effective manufacturing processes into mechanical sub-system design.

Laserjet And Enterprise Solutions, San Diego

Led scanner automatic document feeder (ADF) asset team to deliver broad ADF portfolio from low-cost to high-performance with superior cost structure serving all multi-function printer products. Scouted global supply chain to establish and manage strategic relationship with three external design partners delivering to scanner ADF asset roadmap. Managed global teams of 20 engineers delivering products per company product life cycle process. Engineered specifications, system interfaces, critical system performance and reliability.• Architected and led teams in design, characterization, prototype, validation, and launch for:o Award-winning configurable high-performance 132 ppm, high-reliability 1,500,000-page ADF platform implemented in eight workgroup and enterprise products, saving $20,000,000 and awarded two patents.o First high-performance active separation system with ultrasonic multi-feed sensor electronic-duplex ADF platform implemented in four multi-function printers.o First low-cost electronic-duplex ADF platform implemented in five small office home office products within one year with single R&D investment.

Inkjet And Printing Solutions, San Diego

Oversaw product and process development. Served as R&D champion for all builds. Triaged, diagnosed, resolved and documented all design-related issues. Designed and mentored ME team in Solid Designer advanced surface modeling tool for complex case parts, reducing development schedule, optimizing tooling cost and lead time, as well as improving process Cp and Cpk. Designed complex sheet metal parts for low-volume transfer die and high-volume progressive die. Introduced Recurdyn Multibody Dynamic Simulation to ME community, providing mentorship and consultancy. Pioneered and championed widespread usage of PCB I/F module, enabling effective EE-ME design integration.• Architected, designed and led teams delivering:o Reference design of scanner system, which enabled different vendors with different sensor technologies to deliver optimal solutions independently, saving $30,000,000.o Company-first business B-size mechanical duplexer leveraging low-end consumer product architecture and supply chain, 14 months from concept to market introduction at half the cost of competitive products.o Breakthrough motor-less, sensor-less, all-mechanical ADF implemented in 10,000,000 products.o Industry-first sheet fed ADF with patented input stack stop which improved pick reliability by 20X.o Robust scanning system proof-of-concept characterization, product qualification and validation throughout Photosmart multi-function printer product life cycle.o Patented low-cost, one-way clutch system ADF, proliferated throughout document management industry.

San Diego

Manufacturing Engineer• Ramped and stabilized first Inkjet copier production, including print engine, vision system, and QA audit system. • Organized product discontinuance and tooling disposition process and documentation. R&D Mechanical Engineer• Delivered first Linear Quadratic Gaussian in print head servo system, reference generator and variable acceleration modes to provide greater system margin in all print modes, faults, and environmental conditions, enabling low-resolution encoder system, resulting in $1,500,000 savings.• Designed and delivered a new plenum cooling and aerosol control system, improving transient and steady state heat transfer as well as structural strength in harsh environmental conditions. • Designed and delivered a belt-pulley-DC motor servo system including smart overheat protection algorithms which yield 50% improvement in throughput and duty cycle relative to its predecessor. • Designed and delivered media handling drive system that includes micro stepping mode reducing acoustic noise by 8dB while increasing system tolerance budget. • Designed, tested and validated patented microfluidic servicing algorithm for 612 nozzle print head in extreme heat environment. • Authored a novel method and system to improve print quality and throughput via smart movement and interaction between ink and paper, widely adopted in subsequent products.

Master Of Science (Ms), Mechanical Engineering

Bachelor Of Science (Bs), Mechannical Engineering, Summa Cum Laude

Activities and Societies: Tau Beta Pi Engineering Honor Society