Mayes Testing Engineers, Inc., A Terracon Company Email Format

Civil EngineeringWashington, United States51-200 Employees

Mayes Testing Engineers, Inc., A Terracon Company, operates in the civil engineering field with a focus on construction quality assurance services. Based in Lynnwood, Washington, the firm has an additional office in Tacoma and has served the Puget Sound region since 1984, supported by a combined staff exceeding 150. Its client roster includes Microsoft, Boeing, University of Washington, Amazon, Providence Health System, Port of Seattle, and other public and private entities. 

As part of Terracon, the local team benefits from national support across a network of more than 5,000 employees in more than 150 offices. This arrangement reinforces Mayes Testing Engineers’ role as a substantial provider of construction QA services in the Pacific Northwest, with a strong presence of certified inspectors in Washington state. In 2018, Terracon Consultants, Inc. acquired Mayes Testing Engineers, integrating it into Terracon’s nationwide platform.

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