We make buildings work better.

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

We want to make your facility run the best it can.

With over 1,000 talented professionals, 11 locations, and our own fabrication shop, no project is too small or too big. Whether you simply have a service call, or are planning a 40-story office building, we have the right team of system experts – for you and your buildings’ needs.

Diversity, Equity, Inclusion & Belonging

We are committed to building a truly inclusive culture where equitable pathways are paved and a sense of belonging thrives for all, standing together as one MacDonald-Miller.

Inclusion at MacMiller


PSBJ WA Best Places to Work 2022 Award

We’re a winning team

MacDonald-Miller is the premier mechanical contractor in the Northwest. And a huge reason for that is our people. Here, nothing is higher priority than creating an environment where employees can craft their own path, embrace technology, expand their skills, and, just as important, be themselves. We are a Finalist for “Best Places to Work in Washington”, in large part because our atmosphere is one of creativity and camaraderie, where the level of dedication is matched by the amount of fun we have! Sound like a good fit? Go to macmiller.com/jobs to find out more about the wide variety of opportunities we have available in Washington and Oregon

Careers at MacMiller

We let our work speak for itself.
And it has a lot to say.

View Our Project Gallery
  • EchoNous
  • Key Center
  • St Anthonys Hospital
  • Rainier Building
  • Oregon service project
  • Rooftop Omak School Project


We don’t like to brag about ourselves. So here is what others have to say about us.

See our Awards

We make buildings work better.