P: 425-316-6999 | F: 425-316-6789



MSI Corporate Office

MSI is regularly involved in projects throughout Washington, Oregon and Alaska. We are licensed in Washington, Oregon, Idaho, Alaska, and California.

  • WA License #MCCLUSI101MJ
  • OR License #71127
  • ID License #008013
  • AK License #20829
  • CA License #726477

President Les McClure, with over 45 years of construction experience, leads a team of talented, multi-disciplined construction managers with a wealth of knowledge and experience in all aspects of industrial construction, including heavy mechanical, process piping, and conveyor systems.

Founded with family in mind, we are proud that a second generation of McClures has chosen to join the firm and welcome the addition of two of the McClure sons to the company. The MSI family is equally proud of the third McClure son, who chose to pursue his athletic career, and became a Silver Medalist in Men’s Gymnastics at the 2004 Olympic Games in Athens.

It is our promise and our legacy to continue to provide quality and service in the following areas:

  • Waste Water Treatment Plants
  • Fresh Water Treatment Plants
  • Fabricated Precast Concrete
  • Pump Stations
  • Barge & Ship Retrofitting
  • Marine Construction
  • Ferry Terminals
  • Marina Construction
  • Shoring
  • Bridges
  • Industrial Facilities
  • Miscellaneous Facilities
  • Water Reservoirs
  • Water Tanks
  • Fish Hatcheries
  • Dams
  • Mechanical
  • Design-Build

  • We are an equal opportunity employer. All applicants will be considered for employment without attention to race, color, religion, sex, sexual orientation, gender identity, national origin, veteran/military, or disability status.