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About

MWH Companies

MWH Companies

Slayden Constructors, Inc.

Slayden is a leading Pacific Northwest general contractor, founded in 1984 and based in Stayton, OR. Ninety percent of its annual revenue is focused on water and wastewater facility upgrades, improvements, and expansions. Slayden has forged a strong reputation within the region for executing large, complex projects on time and within budget. With 120 employees (50 professional and administrative / 70 craft), Slayden is a renowned alternative delivery contractor with 88% of annual revenues delivered through GC/CM (WA), CM/GC, or Progressive Design-Build.

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MWH Companies

Methuen Construction Co., Inc.

With over six decades of expertise in the field, Methuen Construction Company, Inc. stands as MWH’s Northeast subsidiary. Methuen is recognized as the most successful self-performing contractor in the industry and consistently strives to deliver innovative solutions to clients at the highest standards.

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Recent News

Inspiring Stories from Women in Construction

In January, MWH officially launched its Women in Construction chapter—an exciting milestone for the company and a meaningful step forward for representation across our jobsites, offices, and leadership teams. The launch reflects a growing commitment to elevating the voices and experiences of women who contribute to every part of our work.

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MWH Onboarding Experience Conference: Building Connections

MWH brought back Building Connections in 2026, a focused two-day conference designed for recently hired professionals. The event gave new team members an opportunity to meet company leaders, learn the firm’s history and strategy, and experience what the organization calls “The MWH Way.”

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MWH Year-End Giving and Celebration

Giving Tuesday was a wonderful success! At MWH headquarters in Broomfield, CO, the team set out with the goal of assembling 50 personal care kits. Thanks to the incredible teamwork and generosity of the community, the group surpassed that target by creating 66 bags.

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