Engineering News-Record, International Rankings:
Contractors:
- #3 in Sewer/Waste
- #105 of Top 250 International Contractors
Engineering News-Record, Top 400 Contractors Rankings:
- #2 in Wastewater Treatment Plants
- #3 in Sewerage and Solid Waste
- #6 in Water Treatment and Desalination Plants
- #17 in Water Supply
- #37 of Top 50 Domestic Heavy Contractors
- #157 of Top 400 Contractors
Engineering News-Record, Top 200 Environmental Firms Rankings:
- #8 of Top 10 in Water Treatment/Supply
- #10 in Top 10 in Hazardous Waste
- #9 of Top 200 Environmental Firms
- #6 of Top 20 Firms Working in Non-U.S. Locations
Engineering News-Record, Top 10 Firms by Type of Work:
- #10 in Construction/Remediation
Industry Awards:
- 2018 National Excellence in Construction – Pyramid Winner – General Contractor, Public Works/Environmental Category – Fremont Water Pollution Control Center Improvements Project, Associated Builders and Contractors (ABC)
- 2018 Excellence in Construction – Award of Merit Winner in the Public Works/Environmental Category – Fremont Water Pollution Control Center Improvements Project, Associated Builders and Contractors Rocky Mountain Chapter (ABCRMC)
- STEP Safety Award – Platinum, Associated Builders and Contractors (ABC)
- 2018 Construction Safety Excellence Award – Second Place in the Utility Infrastructure Division (Over 800,000 Hours Worked), The Associated General Contractors of America (AGC)
- 2018 Construction Risk Partners Build America Award – Merit Winner in the Utility Infrastructure Category – The Santa Ana Wastewater Treatment Plant MBR Expansion Project, The Associated General Contractors of America (AGC)
- 2018 Construction Risk Partners Build America Award – Highway & Transportation (under $10M) Category – Sellwood Bridge Replacement Project: A Sundt/Slayden Joint Venture, The Associated General Contractors of America (AGC)
- H2O Project Award – Wastewater Plant/Pump Stations ($5M+ Category) – The Louisville Wastewater Treatment Plant, Colorado Contractors Association
- Gold Award, Web-based Production/Website Redesign Category, 2018 AVA Digital Awards
- BIM Excellence Winner, Construction News Awards
- International Safety Award Finalist, British Safety Council
- Rising Star Winner: Stantec Treatment Graduate Mechanical Engineer Jonathan May, Construction News Awards
- Rising Star Finalist: Stantec Treatment Graduate Mechanical Engineer Jonathan May, Utility Week Star Awards
- Gold Award, Occupational Health & Safety (RoSPA)
- Gold Award for Minworth STW project, Considerate Constructors Scheme (CCS) National Site Awards