Founded in 1965, MacDonald-Miller Facility Solutions is the Pacific Northwest's premier design-build mechanical contractor, delivering integrated solutions in HVAC, plumbing, electrical, building automation, and energy efficiency. With more than 1,600 employees across offices in Seattle, Portland, Spokane, and beyond, the company designs, builds, and maintains high-performance buildings that shape the future of sustainable infrastructure. Their integrated approach combines in-house engineering, fabrication, and construction capabilities with 24/7 support and rapid response services to ensure tenant comfort and operational excellence.
MacDonald-Miller serves diverse markets including commercial and mixed-use properties, healthcare facilities, government and education buildings, life science and biotech facilities, industrial and manufacturing sites, and data centers. The company is committed to sustainability through energy-efficient solutions, building performance optimization, and the MacMiller Climate Pledge. Their culture is built on core values of collaboration, dedication, safety, community, innovation, and fun - creating an environment where employees execute with distinction and clients trust their toughest projects to integrated teams that consistently exceed expectations.