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We are a full-service, design-build mechanical contractor in the Pacific Northwest. At the heart of MacDonald-Miller is our 100,000 SF sheet metal, mechanical piping, and plumbing prefabrication …
We are a full-service, design-build mechanical contractor in the Pacific Northwest. At the heart of MacDonald-Miller is our 100,000 SF sheet metal, mechanical piping, and plumbing prefabrication shop. Our commitment to Lean Manufacturing and Pull Scheduling produce a high level of quality control, resulting in on-time delivery of superior quality products.