About Us

Our Executive Team

Ben Greenberg

Founder

Aerospace Engineering M.S., Mechanical Engineering B.S.

The founder of Inventions Unlimited, LLC, is a distinguished figure in engineering and design. With a rich background that includes working on a significant NASA project for the next moon mission, he has demonstrated his capability in handling complex engineering challenges. As a former professor at the University of South Carolina, he has influenced the future of engineering through education. His expertise in the field was further established during his tenure as the Director of Engineering at a leading pharmaceutical company. With more than 150 product designs to his name, he brings unparalleled experience to Inventions Unlimited, LLC. His career is marked by a commitment to innovation, leadership, and the advancement of engineering excellence.

Alex Fetner

Senior Project Engineer

Mechanical Engineering B.S., Media Arts B.A., Associate In Science

As Senior Project Engineer at Inventions Unlimited, Alex blends arts and engineering with degrees in Media Arts and Mechanical Engineering from the University of South Carolina. His pharmaceutical background and creativity guide his leadership in projects integrating art and engineering, specializing in electrical circuit board design and fabrication.

Brad Greenberg

Director of Operations

MBA & Bachelor of Science Degree in Finance (MSF & BSF).

Brad brings over 45 years of business operations experience and know-how to Inventions Unlimited, LLC, having owned and operated a number of successful businesses ranging from real estate, to entertainment to the oil and gas industry.

David Wamai

Mechatronics Engineer

Computer Science B.S.

David holds a B.S. in Computer Science and brings three years of interdisciplinary research experience to our team. He led several flagship projects under the Adaptive Real-Time Systems Laboratory at the University of South Carolina, earning funding from the NSF and NASA. His hands-on expertise spans embedded systems, edge computing, FPGA-based digital signal processing, and machine learning. Today, David specializes in building robust embedded solutions, contributing to Linux kernel development, and pushing ML/AI capabilities to the edge. Passionate about all things computer-related, he thrives on solving complex technical challenges and turning cutting-edge ideas into real-world applications.

Pretzel “Zel” Greenberg

Recycling Manager

Certified Treat & Long Walk Lover

As the Office Mascot at Inventions Unlimited, Pretzel “Zel” Greenberg’s primary responsibilities include “recycling” paper products and cardboard through destruction, walking from desk to desk, and lounging on the couch.

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