Precinmac Precision Machining Expands West Coast Presence with Acquisitions of Viper Northwest and Shields Manufacturing

19 December 2020

Precinmac Precision Machining, a diversified manufacturer of high-precision machined components and assemblies in the aerospace and defense, semiconductor, and general industrials sectors, today announced the acquisitions of Viper Northwest, Inc. and Shields Manufacturing, Inc. The acquisitions strengthen Precinmac’s West Coast presence while enhancing the Company’s differentiated value proposition to customers in the region. Financial terms of the private transactions were not disclosed.

Founded in 1985 and located in Albany, Oregon, Viper Northwest primarily serves the deposition sector of the semiconductor market. In addition to the company’s machining, fabrication, and assembly services, Viper Northwest provides complimentary design assistance and support for both manufacturing engineering as well as contract manufacturing. Viper Northwest was the recipient of LAM Research Corp.’s 2020 Supplier Excellence Award.

Founded in 1991 and located in Tualatin, Oregon, Shields Manufacturing serves the semiconductor, life sciences and aerospace markets with precision CNC machined components and assemblies. The business, which is family-owned by William and Ruth Shields, brings medium and high complexity plastic machining and assembly into the Precinmac portfolio.

“We are excited to grow our presence in the West Coast by adding these high-quality businesses into our highly diversified portfolio,” said Eric Wisnefsky CEO of Precinmac. “These acquisitions are part of a multi-faceted strategy to expand our business through acquisition in all sectors. We are well-positioned to continue our growth trajectory as we strengthen our supply chain and continuously deliver quality parts on-time to our customers in critical industries.”

Precinmac has four divisions – Maine Machine Products Company, Hoppe Technologies, Trimaster Manufacturing, and HPG. The Company specializes in precision milling and turning, multi-axis machining, molding and grinding, close tolerance fabrication, and complex geometries. Precinmac is a critical supplier to prime contractors in the aerospace, defense, semiconductor, automation, and other sectors that rely on ultra-high precision manufacturing capabilities and expertise. From its four integrated manufacturing locations in the U.S. and Canada, the Company provides broad capabilities and expertise to these demanding industries.

“These acquisitions will allow us to better serve our customers in the semiconductor, defense, and the aerospace markets,” said John Brocke, President of Maine Machine and Hoppe Technologies. “We are excited to extend our diversified strategy across industries to Viper and Shields and support the growth of our customers.”

Precinmac is owned by Pine Island Capital Partners, LLC, Bain Capital Credit, LP, and Compass Partners Capital.

About Precinmac Precision Machining

Precinmac ( is a leading diversified manufacturer of high-tolerance precision machined components and assemblies. Precinmac has four divisions in the United States and Canada – Maine Machine Products Company, Hoppe Technologies, Trimaster Manufacturing, and HPG.

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Sophia Goulet