Mechanical design • Thermal-fluids • Manufacturing • Controls

Building engineering work from concept to analysis to hardware.

I’m Steven Lleshi, a mechanical engineer specializing in mechanical design and thermal-fluids engineering. My work combines CNC manufacturing, process development, numerical modeling, and control analysis to turn engineering ideas into documented, testable, and buildable results.

Selected work

Featured projects

These projects show how I approach engineering across fabrication, workflow development, thermal analysis, and control-oriented modeling.

Project 1

NYU Makerspace shredder shaft and CNC-machined hardware

CNC manufacturing

For the NYU Makerspace shredder project, I created a formal shredder shaft drawing and machined project hardware using CNC workflows. This project reflects how I move from dimensioned documentation to manufacturable geometry and then to physical execution in the shop.

  • Technical drawing
  • CNC machining
  • Design-to-build
  • Makerspace fabrication
  • Produced a complete shredder shaft drawing for the NYU Makerspace project with drawing number SHRD01 and detailed dimensional callouts.
  • Translated the part into machined hardware, demonstrating setup awareness, tooling judgment, and manufacturing execution.
  • Used this project to connect mechanical documentation with practical fabrication work.
What it showsMechanical design ownership and fabrication capability
Key toolsCAD/CAM, CNC machining, drawing documentation
Engineering drawing and modeled views for the NYU Makerspace shredder shaft
Shredder shaft drawing and modeled views.
CNC-machined shredder project component
Render of shredder chassis.
Project 2

Custom mill and lathe tool library with tested feeds and speeds

Process development

I built a custom tool library from scratch for aluminum and mild-steel workflows across both mill and lathe setups. Instead of relying on stock presets, I organized tool geometry, holder data, offsets, and tested cutting parameters into reusable libraries for more consistent machining workflows.

  • Fusion tool library
  • Feeds and speeds
  • Mill and lathe
  • Workflow standardization
  • Created separate JSON libraries for 8L lathe aluminum, 8L lathe mild steel, 770 mill aluminum, and 770 mill mild steel workflows.
  • Included parameters such as spindle speed, cutting feed, plunge feed, stepdown, stepover, coolant, and material-specific presets.
  • Turned shop knowledge into a reusable engineering asset that improves repeatability and setup efficiency.
What it showsIndependent machining judgment and process planning
Key toolsFusion tool libraries, Tormach workflows, tested cutting data
Tool library table showing listed tools for a 770 mill aluminum setup
Tool library view showing structured cutter data and geometry.
Project 3

All-electric heating systems for New York City public schools

HVAC & energy

This senior design project focused on converting a New York City public school to an all-electric heating system using rooftop air-handling units and electric water heaters. I acted as the project manager and lead mechanical designer, coordinating the team and creating detailed ductwork and piping models in Revit and Fusion 360 based on the original school blueprints.

  • HVAC design
  • All-electric heating
  • Revit & Fusion 360
  • Public school retrofits
  • Led the project as "project manager", aligning scope, schedule, and deliverables for an HVAC retrofit proposal for a NYC public school.
  • Designed major portions of the supply and return ductwork using Revit, referencing original architectural and mechanical drawings to maintain realistic routing and clearances.
  • Modeled rooftop American Standard heat pump units and electric water heaters in Fusion 360 and integrated them into the overall system layout.
  • Prepared drawing sheets and 3D views illustrating AHU placement, risers, and distribution, packaged for review by the NYC School Construction Authority (NYCSA) to support greener, all-electric design planning.
What it showsHVAC system design, coordination, and client-oriented documentation
Key toolsRevit, Fusion 360, architectural/MEP plan reading
Why it mattersDemonstrates experience with building-scale energy upgrades and stakeholder-facing design work
Rendered rooftop AHU and ductwork layout for NYC public school all-electric heating project
Rooftop air-handling units and color-coded ductwork for the all-electric heating concept.
Piping and riser drawing sheet for all-electric heatng and hot-water distribution
Piping and distribution system floorplan rendering.
Project 4
Project 4

Open-loop buck converter with Type-III compensator analysis

Controls & power electronics

This project analyzes an open-loop buck converter in MATLAB and evaluates a Type-III compensator through frequency-response plots. It shows my ability to work beyond purely mechanical topics and handle transfer functions, loop shaping, and stability-oriented engineering analysis.

  • MATLAB controls
  • Bode plots
  • Type-III compensator
  • Buck converter
  • Modeled the converter plant, compensator response, and overall loop gain in MATLAB.
  • Generated plots for plant magnitude/phase, compensator shaping, and total loop response.
  • Used gain-margin and phase-margin analysis to evaluate control behavior and stability characteristics.
What it shows Cross-disciplinary range in modeling and system dynamics
Key tools MATLAB, transfer functions, compensator design
Why it matters Useful for hardware, controls, and thermally coupled electronics roles
Bode plots for plant, Type-III compensator, and loop gain of an open-loop buck converter
Buck converter plant, compensator, and loop-gain plots.

About

Mechanical engineer with analysis and build capability

My background is strongest where design, thermal behavior, manufacturing, and computation overlap. I’m especially interested in engineering roles that value strong fundamentals, practical execution, and the ability to work across modeling and hardware.

Resume & links

Professional profile

  • SpecialtiesMechanical design, Thermal-fluids Engineering
  • Technical rangeCNC, CFD, MATLAB, Autodesk Fusion, AutoCAD
  • LocationNew York City, NY

Contact

Professional contact