About D5 DEM

D5 DEM LLC is a family owned and operated engineering company in the beautiful rolling hills of Sussex County, New Jersey. Established in 2015, our specialization is in the development of prototypes from inception through fabrication. Our team has years of experience in the areas of CAD modeling, electronic circuit design, software engineering, and CNC fabrication. By combining these skills, we have overseen significant projects and delivered unique prototypes, while keeping nearly every aspect of the process in-house. Whether you need a one-off prototype to present to potential investors, small batch manufacturing services, or job shop work to create or repair components, we have the resources and expertise to make it happen.

Meet the Team

All team members are alumni of The Pennsylvania State University.

  • Michael Dempsey

    Michael established D5 DEM in 2015. Since then, he has worked as lead engineer on several large scale, high-profile, design and development projects. Michael holds his Master of Science degree in Electrical Engineering and minors in Mathematics and Physics. He is highly proficient in PCB and systems design, CAD modeling, manual and CNC machining, and many other aspects of fabrication. Michael’s personal passion has led to the development of several product lines utilizing proprietary techniques for micro-manufacturing.

  • Mathew Dempsey

    Mathew has been working with the company since 2016. He has developed firmware used in commercial products created by D5, along with software applications used in the information technology industry. Mathew has earned his Bachelor of Science degree in Computer Science and a minor in Cybersecurity Computational Foundations. His skills are not limited to computer science, as he is also highly proficient in machining and other fabrication techniques.

  • Joseph Dempsey

    Joseph’s involvement with the company has increased recently, even as he continues to pursue his Master of Architectural Engineering degree in Architectural Engineering, with a minor in Engineering Mechanics. Joseph lends his experience in structural engineering to our work, and has assisted with CAD, finite element analysis, and fabrication for our larger projects. Joseph will be graduating college in 2024.

  • Michael Dempsey, Sr.

    Michael holds his Bachelor of Science degree in Science with a focus in Mathematical Science and Computer Engineering. He has over 35 years experience in electronic, mechanical, and software design, as well as engineering and fabrication. His knowledge and experience with CNC machine design and operation is an invaluable resource. Michael has the ability to find unique solutions to difficult problems that arise during prototype development.

  • Lisa Dempsey

    It is easy to say that Lisa is the backbone of D5. She functions as our office manager, vendor liaison, and finance officer, allowing D5 to run smoothly. Lisa holds her Bachelor of Science degree in Nursing and is a certified cardiovascular nurse, making her ideally suited to be our health and safety officer. In addition to helping keep projects on track, Lisa is included in the design process of all projects to provide a varied perspective on both design and function.