About Us

MWH Constructors, now part of the Stantec Construction Group, is a global project delivery company with a focus on water and energy. With the ultimate goal of delivering maximum value to our clients and their local communities, we provide single-source, integrated construction services and the full range of project delivery methods. Incorporating industry-leading preconstruction services and safety practices, our multi-disciplined team of construction professionals delivers a wide range of projects ― including new facilities, infrastructure improvement and expansion, waste-to-energy construction, and capital construction services.

MWH Constructors offers integrated program management, engineering and construction expertise and proficiencies derived from our global engineering experience and our self-perform capabilities as a leading U.S. contractor.

MWH Constructors leads the Stantec Construction Group comprising MWH Constructors and Slayden in the U.S. and Stantec Treatment in the U.K.

Stantec Treatment Slayden




Blair M. Lavoie, PE

A registered Professional Engineer and General Contractor, Lavoie is President of MWH Constructors, a top-tier, global construction company in the water and wastewater industry. Leading the newly formed Stantec Construction Group, Lavoie provides direction and leadership to MWH Constructors and Slayden in the United States and Stantec Treatment in the United Kingdom. Lavoie has played an instrumental role in helping to shape the construction industry’s adoption of alternative project delivery models, such as progressive design-build and CMAR.

John Cevaal, PE

Cevaal is a Professional Engineer and a Senior Vice President with MWH Constructors. With more than 30 years of experience in the water sector, he has been responsible for all aspects of project execution on a wide range of project types, from complex water and wastewater projects to capital construction services and facilities programs for global industrial clients. Having overseen work in China, Australia, Japan, Israel, Canada and the United States, he has an in-depth knowledge and understanding of integrated program management.

Philip C. Croessmann, J.D.

Croessmann is the Global Director of Risk Management for MWH Constructors. In addition to being a licensed Attorney, Croessmann is a Registered Architect and General Building Contractor with more than 30 years of experience providing risk, commercial and claims management services. He is active in the American Bar Association’s Construction Forum. He also served as an arbitrator for the American Arbitration Association and is actively involved in alternative dispute resolution.


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We put people first.

Our people at the core of what we do. We want our employees to succeed, however they define it – from accomplishing stimulating, challenging work to becoming leaders in their fields and communities. We are committed to supporting, fostering and investing in individual success through a culture of opportunity, mentorship and innovation.

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We do what is right.

A company’s reputation centers on its integrity. The way we treat our people, clients and neighbors reflects who we are, what we believe in, and how we do our work. Our commitment to doing things right is evident in everything we do, from professional excellence in our project work to taking responsibility for projects within our communities.

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We are better together.

Strong, long-lasting relationships directly impact the success of our employees, clients, projects and communities. We will reach our full potential as an organization and as trusted advisors for our clients only when we combine our unique strengths and passion.

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We are driven to achieve.

Achievement at every level begins and ends with a firm commitment to being the best we can be. We are committed to becoming and remaining a top global construction firm. It’s an ambitious goal, but it’s one we take seriously. In order to achieve our Top 10 objective, we recognize our key challenge is to maintain the stability and strength of our local relationships while balancing the management of growth projections.


The MWH Constructors vision is to deliver safe, successful and sustainable design and construction projects across the environmental/infrastructure marketplace. We will achieve our Vision through careful planning and execution of. . .

Our Strategy:

  • To be the employer of choice to attract and retain the best talent in the industry – an organization that cares, develops and protects its employees
  • To be a partner and collaborate with clients on Safety, Project Excellence, Ethics and Quality
  • To be a Top Tier Contractor in the U.S. and U.K. water marketplace
  • To be a diverse and forward-looking service provider, always exceeding client and stakeholder expectations
  • To provide value and return on investment to our employees and our shareholders

Company History

MWH Constructors, a leader in diversified project delivery, was formed from five water and energy companies with a combined 180-year history. As part of Stantec Construction Group, we are a fully integrated one-stop shop for the full life cycle of any project. We maintain deep connections to the communities in which we work because we’re on the ground, actively designing and building globally. Our ongoing experience with both traditional and alternative project delivery models underscores our creative, client-by-client approach to projects. Our self-performance sets us apart from our competitors. We have the skills, experience and pride of workmanship to execute with unrivaled sophistication.

180 Years of Experience

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Our History

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