Nathaniel J. "Niel" Leon

Available to hire

I have over 50 years of experience in mechanical systems design, product development, commercialization, and field support across commercial and governmental sectors.

About

I have over 50 years of experience in mechanical systems design, product development, commercialization, and field support across commercial and governmental sectors. I work hands-on with CAD modeling for machine and mechanism design, tool design, plastic molding, and composites, and I have helped develop more than 150 products and systems—from medical devices to toys and from industrial automation to aerospace hardware. I have been designing and developing products using 3D printing since the beginning in 1987 and am familiar with most current technologies in use today.

In my current role at Johns Hopkins University is winding down to 1/2 time. I lead a new Systems Engineering Design Services effort to provide system-level engineering for researchers and students to mitigate risk, shorten time to startup, and improve final output quality. Since 2010 I have also served as the university’s Laser Safety Officer, helping cultivate a culture of safety while enabling high-quality research, and I coordinate UAV operations to ensure FAA compliance and policy alignment. My career is defined by delivering robust, practical engineering solutions that advance research and keep people safe.

I am researching gig jobs to keep myself active as a mechanical designer and product developer.

  • Joined March 2026

Industry experience

  • Manufacturing
  • Healthcare
  • Life Sciences
  • Government
  • Professional Services
  • Education
  • Other

Projects · 6

This is a knee exercise machine that uses elastomeric bands or bars of different sizes to allow a person lying prone to exercise their knees. The height and orientation can be adjusted so that the pads are at the correct level, properly contacting the lower leg, and used in extension or retraction. A similar design is not shown using constant force springs. This is available upon request.

  • 3D Designer
  • 3D Modeler
  • Project Manager

This was done as a quick personal project. I have an antique Persian Tray I inherited from my maternal grandfather. I wanted to turn it into a coffee table for my home. This is the result. It is currently sitting in my great room

  • 3D Designer
  • 3D Modeler
  • Project Manager

This chiller dispenser is set to work with 1-3 liter box wines. It is shown with 3-liter boxes. One of the spaces has the cover in phantom to show the box in place. To cool white wines, Peltzer chillers are included. Their heat sinks are shown at the bottom. This system is designed to work with standard wine glasses.

  • 3D Designer
  • 3D Modeler

This mug is designed to facilitate cleaning while providing a handle that can be changed out for different configurations based on the client's//end-user's needs and desires. The mug body would be made from glass; it too could be customized.

  • 3D Designer
  • 3D Modeler

Working for a company that made specialty visualization tools, I designed a soft goods bag to hold one of their student camera microscope systems. This bag had storage space for all components and secured the microscope camera so it could be safely transported.

  • 3D Designer
  • 3D Modeler

I designed, commissioned the prototype fabrication including having several 3-D printed parts done in fiberglass nylon prototypes for testing and evaluation. Unfortunately, the client ran out of money before we could go beyond the prototyping stage. We did prove the functionality and validated the consumable molds for the disposable components. See Head for Back Pain Needle Waldo

  • 3D Designer
  • 3D Modeler

Work experience· 8 roles

Senior Staff Engineer for WSE-ORT · The Johns Hopkins UniversityJul 2024 – Present · 2 yrs 5 mos

Developing a Systems Engineering Design Services program to provide systems-level engineering to researchers and students, mitigate risk, shorten time to startup, and improve output quality; supports Hopkins' effort to be a leading research institution delivering socially worthy resolutions.

Laser Safety Officer / Safety Advocate · The Johns Hopkins University - Homewood CampusDec 2010 – Jun 2024 · 13 yrs 7 mos

Led the laser safety program (established 2012) to optimize research quality while maximizing safety for students, faculty, and staff. Also served as UAV coordinator, ensuring FAA compliance and adherence to the university drone policy.

Chief Engineer and Technical Leader · Pulse Needle Free Systems, Inc. (Felton International Inc.)Sep 1997 – Dec 2006 · 9 yrs 4 mos

Led a multi-disciplinary, multi-national design team for needle-free injection systems; managed budgets (> $500k/year), schedules, SOPs, purchasing, and external vendors; secured five U.S. utility patents and two FDA 510(k) clearances.

Principal Technologist · Unicorn Technical ServicesMar 1993 – Dec 2021 · 28 yrs 10 mos
Mechanical Engineer · Environmental Technology Group, Inc.Jan 1991 – Mar 1993 · 2 yrs 3 mos
Senior Manufacturing Engineer · H. L. Yoh Co.Feb 1988 – Sep 1990 · 2 yrs 8 mos
Design Engineer · ILC Dover, Inc.Jun 1981 – Feb 1988 · 6 yrs 9 mos
Mechanical Engineer in Production Engineering · Exxon Office Systems Co.Aug 1979 – Jun 1981 · 1 yr 11 mos

Education

BS in Mechanical Engineering · Purdue University2030 – 1978
Cooperative Education Certification · NASA, Marshall Space Flight Center, Huntsville, AL2030 – 2026

Certifications and awards

FDA 510(k) clearances for human injector system2030 – 2026
U.S. Utility patents (5)2030 – 2026
Patents pending (International and U.S.)2030 – 2026

Hire Nathaniel J. "Niel" Leon today

Post a job and invite Nathaniel, or contact them directly. No hidden commission.

Post a job