David Carrozza, Inventor of Spruzza's On-board Cycling Cooling System

"It was a great pleasure to have Dave as our consultant. He delivered the best possible technical assistance for our medical device projects, which has involved both mechanical and electronic engineering. He provided support on the research and development of projects as well as contributing pertinent ideas for the design of better and more cost effective products. With Dave’s valuable suggestions, we were able to achieve our goals and beat our time line. In addition, we always appreciated his timely response in providing answers to our questions and great data reports that were compatible with our company system."

Reza Saied, VP of Engineering at VORTRAN Medical Technology, Inc.

"DT Engineering Associates provided professional engineering design services and critical vibration and thermal mechanical engineering expertise to our company for 3 years, and was a major factor in the realization of Aspectrics Research and Development 100 Award winning encoded-photometric infrared analyzer. DT Engineering Associates were contracted to assist my analytical instrument start-up company make the transition from prototype to product. The opto-mechanical prototype was in two ugly sheet metal boxes and had an audible vibrational resonance that degraded spectral resolution and prevented operation at the target scan rate. Mr. Tostenson diagnosed the root cause of the vibration and developed an effective solution that preserved our cost target and kept the product development effort on schedule. DT Engineering Associates designed a sleek enclosure with an integrated thermal management solution for our electronics that enabled Aspectrics to reduce the instrument volume by a factor of five. DT Engineering Associates transformed our bench-top prototype into a finished product. I highly recommend their services for other opto-mechanical instrument developers."

Thomas W. Hagler, Ph.D., Research and Development Manager at Sandia National Laboratories

"Dave Tostenson was hired to update and optimize our product, the GoBagger scoop - one person sandbag filler, for production with a new type of manufacturing process. We were ready for the next step up in production and needed a redesign that was sensitive to our patents and to the specifics of how the tool functions that allowed a scalable path to increased production. Dave understood completely our needs, highlighted a detailed process and gave a reasonable cost. He delivered on each and every point, on time and with excellent results. I highly recommend Dave as a knowledgeable and high integrity professional."

Matthew Piner, Adjunct Professor of Architecture at Consumnes River College

"This is a great group to work with!!! Helped us in every phase from concept, 3d printed prototypes and most importantly stayed on top of the project management. I recommend using this company!!!"

Matt Kiraly, President at Fashion Optical Display

"I have worked in engineering for 31 years and worked on some of the largest programs in Telecommunications globally - in that time I have been exposed to many good firms but none have even come close to the DT Engineering Team - the innovation and contributions to our product development helped shape what were great products in their own right to magnificent ones. The detail and presentation DT has brought to our company product has helped us garner acceptance and broker deals on those products with several of the world’s Largest OEMs and Wireless Carriers. We will continue to utilize David and the rest of his team in the future and I want to give them our highest recommendation."

James Lapham, COO at CitiSite Corporation

"Advanced Metal Solutions has had the pleasure of working with the DT Engineering team for many years. The clients that we have referred to them have not only been impressed with their work, they soon realize the importance of having DTE as part of their own internal engineering team to help them get their designs completed quickly, on-time, and without any unexpected problems. DTE’s “Do the Math First” goal enables clients to receive information that prevents problems down the road. Our factories in Taiwan and China have received DTE designs for sheet metal, die-casting (aluminum and magnesium), machining, extrusions, plastic and other commodities that have been easily deciphered, easily produced, and provided to customers that have enjoyed the synergy of our two companies."

Rick Anixter, VP of Sales and Customer Service at Advanced Metal Solutions

"DT Engineering always gets great results. Their team is realistic on what it really takes to get the task complete, no surprises. For selfish reasons I almost don't want this gem discovered so that I have them to myself. It is difficult to make something tangible from an idea in my head but that team always gets it done."

Jeff Wilson, President at Extreme Engineering

What We Are

DT Engineering Associates is an engineering consulting firm that focuses on product and equipment development. We have over thirty years of product development experience in the areas of mechanical engineering, electrical engineering, and industrial design. We take pride in our ability to solve difficult engineering and design problems, getting it right the first time.


DT Engineering Associates, Inc.
920 Reserve Dr. Suite 190
Roseville, California 95678
Office - 916.474.5167
Fax - 916.749.3793


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