Company History

Continuing Our Legacy of Engineering Innovation

A rich and diverse history, our heritage stems from three companies that joined to form MWH as it is known today: James M. Montgomery Consulting Engineers (JMM), Watson Hawksley and Harza Engineering Company. These mergers – JMM and Watson Hawksley in 1992 and Montgomery Watson and Harza in 2001 – galvanized the company’s rise to prominence on the world platform where we are now a true leader and a formidable competitor in the water infrastructure industry.

JMM was founded in 1945 in southern California. In the early 1990s, JMM merged with English firm Watson Hawksley, Ltd. of High Wycombe, England, which originated in London in the 1850s. This created a company of global scope with similar corporate cultures that honored individual expertise and encouraged teamwork, innovation and initiative; and a common view of the industry’s future. The name was eventually changed to Montgomery Watson Harza then to MWH Global in 2001.

In 2010, MWH acquired United Kingdom (UK) based Biwater Services Ltd, a leading UK water construction and engineering firm. The acquisition afforded MWH a broader range of skills to address the creation, management and optimization of existing water infrastructure assets and enhanced our ability to service the full asset life cycle of our clients from feasibility through commissioning and operation. The companies have a shared heritage in the UK market that dates back to 1820.

Today, MWH is comprised of more than 180 global offices in 35 countries, operating on six continents bringing highly trained engineers, managers, consultants, policy and project advocates, informational technologists, economists, statisticians, public relations professionals and financial experts together. We continue to be dedicated to innovation and committed to mastering and applying emerging technologies to create client-focused results. We have engaged in the engineering, construction, financing and management of some of the world’s largest and most technically significant water and natural resources projects in the world.

We continue to build on our strong foundation and are constantly improving our services by delivering projects faster and more efficiently through our global resources, aggressively sharing knowledge at an accelerated pace and demonstrating our willingness to change and adapt.

Company History Timeline

Ames Crosta Babcock Company founded and later acquired by Biwater Services, Ltd.

T. Hawksley established practice in England

T&C Hawksley International engineering partnership established

Dodd & Dodd Public health engineering firm established in the UK

Harza Engineering Energy and environmental engineering in Chicago

JD & DM Watson Partnership formed for municipal wastewater treatment

James M. Montgomery Environmental engineering firm established in California.

Watson Hawksley Formed after merger of JD & DM Watson and T&C Hawksley

Montgomery Watson Global environmental engineering company formed after merger of Watson Hawksley and JMM

Montgomery Watson Harza (MWH) Established after merger with Harza Engineering Company

Biwater Services Ltd. MWH acquires UK water construction and engineering firm