Established in 1905, Manson began as a small, family-owned Puget Soundmarine pile driving business. Today, Manson thrives as an employee-owned company with a national presence offering a wide range of skills and services.Headquarters remain in Seattle, though we have expanded to include permanentfacilities in Northern and Southern California, Louisiana, and Florida.

Manson is a leading heavy civil marine contractor with a fleet of heavy marine equipment that includes 60 specialized vessels and over 50 barges. Our services include dredging, waterfront construction, bridge building, heavy lifts, and offshore work. Manson takes great pride in having a reputation for doing quality work that meets or exceeds the owner’s specifications and budget requirements and is completed safely and on time.