Headquartered In Aurora, IL USA

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About Simpson Technologies

Simpson Technologies was founded by the Scottish foundryman Peter L. Simpson in 1912 and is now an over one hundred year old, five generation family business specializing in the design and production of advanced process technologies and services for the global metal casting and chemical process industries. Our primary products include batch and continuous high intensity mixing equipment, molding sand coolers, on-line mixer control & automation systems, core sand preparation systems, foundry sand reclamation systems and sand laboratory instrumentation.

4 Presidents

The last 4 Simpson Presidents have also served as President of the American Foundry Society. Current Simpson President Bruce W. Dienst is the only person ever to have served as President of AFS, FEF and CISA.


Simpson has contributed to the Foundry Educational Foundation every year since its founding in 1947 – for a total of over $805,000.00 in support ranking Simpson in the highest level of corporate donors.

Gold Medals

One of the six AFS Gold Medals was established in 1945 and is named in honor of Simpson founder Peter L. Simpson. Bruce L. Simpson was awarded the AFS McFadden Gold Medal in 1976.

Subsidiaries in 2 countries


Simpson Technologies GmbH
Steinhausen, Switzerland

Licensees producing products in 2 countries


Sintokogio Ltd.
Nagoya, Japan


Kuttner do Brasil Equipamentos Siderúrgicos Ltda.
Contagem/Belo Horizonte (MG), Brazil

Brand Acquisitions


Dietert brand automation products acquired from George Fischer Foundry Systems, Inc. of Holly, MI USA by Simpson


Gerosa brand sand laboratory testing equipment acquired from Ing. Ricardo Gerosa S.R.L. of Rosario, ARG by Simpson


George Fischer (+GF+) / DISA brand sand laboratory testing equipment acquired by Simpson from DISA Industrie AG of Schaffhausen CH


Beardsley & Piper LLC acquired by Simpson from Pettibone LLC and Heisley Holding LLC of Lisle, IL USA


Hartley Controls Corporation acquired by Simpson from Neenah Foundry Company of Neenah, WI USA

Simpson Is Represented In More Than 30 Countries View Our Locations