Mechanical Engineer
in San Diego, CA

Mechanical Design SolidWorks OnShape ANSYS FEA Composite Fabrication 3D Printing First Principles Approach DFM Microsoft Suite Mechatronics
Justin H. Tong

Thanks for visiting my site. I'm a mechanical engineer graduating from San Diego State University in Spring 2026. I find myself drawn to engineering problems that let me discover, iterate, and optimize toward a final solution.

In my last year at SDSU, I worked on a capstone project sponsored by General Atomics to build a modular pylon for the MQ-9A. The pylon was designed to accommodate multiple stores using MRL, 14-inch and 30-inch BRU lug sets. Working alongside the team, I helped design the main pylon structure, owned the laminate theory and composite design, and performed vacuum-assisted resin infusion on the composite parts. I also designed and refined a fully mechanical store release demo system.

Through the American Society of Mechanical Engineers club, I led a small team of ME students to design and build a fully 3D-printed combat robot for a CSU competition. 3D printing changes the design philosophy entirely. I designed the chassis, drivetrain, and wired the whole electrical system. Designing for unpredictable forces was a fun challenge.

MQ-9A Modular Pylon

Senior Design — General Atomics
Sept 2025 — May 2026
MQ-9A Modular Pylon MQ-9A Modular Pylon MQ-9A Modular Pylon

Engineered a modular payload pylon for the MQ-9A Reaper UAV, increasing hardpoint connections from 1 to 4. Ran static structural FEA across multiple load cases, designed composite layups using laminate theory, and fabricated structural components via VARTM. Delivered a full-scale design package and half-scale model to General Atomics engineers.

SolidWorks ANSYS FEA Composites / VARTM MIL-STD

3-lb Combat Robot

ASME Design Team — Project Lead
Sept 2025 — Apr 2026
3-lb Combat Robot 3-lb Combat Robot

Designed and 3D printed a 3-lb combat robot optimized for additive manufacturing constraints and impact loading. Led a multidisciplinary team through full design-build-test cycles for CSUN and National Havoc Robot League competitions. Selected materials and manufacturing methods balancing cost, lead time, and structural requirements.

SolidWorks 3D Printing CNC DFM

FSAE Composite Undertray

Aztec Electric Racing
Fall 2023 — Spring 2024

Contributed to the research, design, and fabrication of a carbon fiber composite undertray for SDSU's Formula SAE electric vehicle. Also developed an instrument panel in SolidWorks compliant with FSAE hardware and safety regulations.

SolidWorks Carbon Fiber FSAE Regs
Personal Projects

Automated ID Card Sorter

Concept Design
2025

Designed a fully automated ID card sorting system using optical character recognition (OCR) and custom sorting logic to organize cards into alphabetical order. Conceptualized for the SDSU Card Office to improve operational efficiency. Not physically built.

OCR Automation Mechanical Design

Automated Plant Watering System

Build
2025

Built a smart plant watering system using capacitance-based moisture sensors integrated with an ESP32 microcontroller. Connected to a home server with a WiFi-based dashboard for remote monitoring and control, with a failsafe through fully autonomous operation.

ESP32 IoT Sensors Home Server