In partnership with our clients, we provide best-in-class solutions. Our work throughout the water, energy and infrastructure sectors continues to be honored for its excellence by top industry institutions and publications, as does our outstanding commitment to safety.

2014  2013  2012  2011  2010  2009  2008

2014 Industry Rankings

Engineering News-Record Top 400 Contractors in Environment Sourcebook, September 22, 2014
#1 Top 25 in Wastewater Treatment Plants
#3 Top 50 in Sewerage and Solid Waste
#5 Top 25 in Water treatment and Desal Plants
#8 Top 50 in Water Supply

Engineering News-Record Top 250 International Contractors Sourcebook, September 1, 2014
Top 250 International Contractors

Engineering News-Record Top 500 Design Firms Sourcebook, July 28, 2014
#1 Top 10 in Sewer / Waste
#3 Top 10 in Water
#35 Top 225 International Design Firms
#46 Top 150 Global Design Firms

Engineering News-Record Top 500 Design Firms Sourcebook, July 14, 2014
#1 Top 25 in Sanitary and Storm Sewers
#2 Top 50 in Sewer and Solid Waste
#3 Top 25 in Wastewater Treatment Plants
#3 Top 20 in Transmission Lines and Aqueducts
#3 Top 20 in Water Treatment and Desalination Plants
#3 Top 10 in Hydro Plants
#4 Top 50 in Water Supply
#19 Top 500 Design Firms

Engineering News-Record Top 400 Contractors, May 26, 2014
#140 Top 400 Contractors

Engineering News-Record Top 500 Design Firms, April 21, 2014
#2  Top 20 in Sewerage and Waste
#4  Top 20 in Water
#14 Top in Water
#19 Top 500 Design Firms

New Civil Engineer
#2 Top Firms in Water
#8 Top Firms in Energy

2014 Awards
Accreditations
(one or more parts of MWH are approved to one or more of the standards listed)
  • ISO 9001 – Quality Management System Standard
  • ISO 14001 – Environmental Management System Standard
  • OHSAS 18001 – Occupational Health and Safety Management System Standard
  • Investor in People