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, 10 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.

Through the Eyes of MacMiller

We've grown a lot over the years, but what has not changed is our vision, our culture, or our dedication to our customers. Our latest video created for our annual employee appreciation party perfectly portrays what it's like to be a part of the MacMiller family.

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 2015 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
  • Seattle-Aquarium
  • be aerospace cropped
  • Key_Center
  • Home-Plate
  • The Washington Athletic Club in downtown Seattle is a hotel, banquet facility and gymnasium, built in 1930 and recently the recipient of a new kind of energy upgrade.
  • Seattle Sheraton Boiler Retrofit
  • Lincoln Square Expansion Phase 2
  • Swedish_PerkinsWill

Latest News

We make buildings work better.

Our Offices


Ph: 206-767-7995

Fx: 206-767-6773

Corporate Mailing

PO Box 47983
Seattle, WA 98146-7983

Corporate Street

7717 Detroit Ave SW
Seattle, WA 98106

Madison Office

1004 Madison Street
Seattle, WA 98104

Prefabrication Shop

3701 S Norfolk
Seattle, WA 98118



Ph: 425-258-9310


3211 Broadway Ave
Everett, WA 98201



Ph: 206-767-7995


12031 Northup Way
Suite 201
Bellevue, WA 98005



Ph: 253-680-3170


2500 S Holgate St
Tacoma, WA 98402



Ph: 971-244-0901


12911 NE Airport Way
Portland, OR 97230



Ph: 971-244-0901


4660 Main Street
Bldg B, Suite #250
Springfield, OR 97478



Ph: 541-526-0655


1555 SE 1st Street
Redmond, OR 97756


Moses Lake

Ph: 509-766-6637


500 South Lasco Lane, Suite 227
Moses Lake, WA 98837

Our Locations