Hello, my name is

Alex Castrejon

Mechanical Engineering Student

About me

Hello! I am a senior undergraduate student at the Georgia Institute of Technology studying Mechanical Engineering. I am originally from Lilburn, GA and have always loved tinkering and learning about machines. I’ve torn down and explored everything from gumball dispensers, to 80’s muscle cars, to most recently a custom CNC Bandsaw I built at an internship. I believe that the best machines are reliable, durable, resilient, and innovative above all else. While the softwares, materials, and processes I use have evolved thanks to my past work experience and time as a student, my goals and passion have stayed the same: to build machines for this world that will outlive even me.

What I do

If you’d like to see my work I invite you to take a look at some of my projects. Have an idea for a machine but don’t know where to start? Feel free to reach out! I’m always hapy to help.



A fill list of skills and work experience can be found on my resume:



R.N.C Industries


  • Designed and fabricated a CNC bandsaw intended to automate the cutting of large quantities of insulation, reducing labor by 50%
  • Successfully repaired an existing bag making machine with a custom-designed plastic tensioner, yielding a 200% increase in
    per-person output
  • Satisfied all machine functionality requirements strictly using open-source electronics (Arduino and Raspberry Pi)
  • Produced all designed components in the company machine shop, using a mill, lathe, MIG welder, multi-cutter saw, etc.
  • Developed a user-friendly machine interface through the use of Python and C++

EFC Trim


  • Measured and installed base, crown molding, casing, and shoe mold
  • Installed electronic locks, deadbolts, crash bars, and other door-related hardware
  • Read and interpreted floor plans to complete punch lists and general construction
  • Operated power tools including circular saws, miter saws, hammer drills, routers, etc.

A fill list of skills and work experience can be found on my resume: