We make buildings work better.

MacDonald-Miller Facility Solutions is the top choice, design-build, commercial mechanical contractor in the Pacific Northwest.

The MacMiller Difference

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Your project works better
with MacDonald-Miller.

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  • Seattle Aquarium
  • Highline College
  • Capitol Hill Station
  • Boeing
  • Maritime Building Seismic Upgrade and Renovation
  • Construction
  • North Lot
Tech in fabrication shop

Fabrication Services

When you choose MacDonald-Miller for your fabrication needs, you're not just getting a product – you're getting a commitment to excellence. Whether you're in search of Specialty Manufacturing, Piping Fabrication, or Sheet Metal Fabrication, we're here to serve you. With our expertise in bending, cutting and burning, forming, welding, and final assembly services, we're uniquely equipped to meet all custom requests because we have the right tools and the right people for any job!

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We make buildings work better.