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| Subsidiaries of Tetra Tech, Inc. |
| | | |
| NAME | | JURISDICTION OF FORMATION |
| Advanced Management Technology, Inc. | | Virginia |
| America's Schoolhouse Consulting Services, Inc. | | New York |
| American Environmental Group, Ltd. | | Ohio |
| ARD, Inc. | | Vermont |
| Ardaman & Associates, Inc. | | Florida |
| Arlington Power Consulting Limited | | Nigeria |
| BFP Consultants Pty Ltd | | Australia |
| BIOCNG, LLC | | New York |
| Bovell Freeman Holley (Pty) Ltd | | South Africa |
| BPR-Énergie Inc. | | Quebec, Canada |
| BPR Inc. | | Quebec, Canada |
| BPR-Infrastructure Inc. | | Quebec, Canada |
| BPR-Triax Inc. | | Quebec, Canada |
| Carson Group (AKL) Limited | | New Zealand |
| Carson Group Limited | | New Zealand |
| CICP Consultores Internacionales, LLC | | Delaware |
| Clifton Coney Group (NZ) Limited | | New Zealand |
| Coffey Afghanistan LLC | | Afghanistan |
| Coffey Afghanistan Pty Ltd | | Australia |
| Coffey Africas Holdings Pty Ltd | | Australia |
| Coffey Americas Holdings Pty Ltd | | Australia |
| Coffey Asia Limited | | China (Hong Kong) |
| Coffey Australia Holdings Pty Ltd | | Australia |
| Coffey Consultoria Servicios SpA | | Chile |
| Coffey Corporate Pty Ltd | | Australia |
| Coffey Environments Australia Pty Ltd | | Australia |
| Coffey Environments Pty Ltd | | Australia |
| Coffey Europe ME Holdings Pty Ltd | | Australia |
| Coffey Geotechnics Limited | | United Kingdom |
| Coffey Geotechnics Pty Ltd | | Australia |
| Coffey GTS Arabia LLC | | Saudi Arabia |
| Coffey Holding SDN BHD | | Malaysia |
| Coffey International (Africa) (Pty) Ltd | | South Africa |
| Coffey International Development Holdings Limited | | United Kingdom |
| Coffey International Development Limited | | United Kingdom |
| Coffey International Development Pty Ltd | | Australia |
| Coffey International Development (Middle East) Pty Ltd | | Australia |
| Coffey International Development Sp. Z.O.O. | | Poland |
| Coffey International, Inc. | | Delaware |
| Coffey International Incorporated | | Philippines |
| Coffey International Limited | | Australia |
| Coffey International NZ Limited | | New Zealand |
| Coffey LPM Pty Ltd | | Australia |
| Coffey (Malaysia) SDN BHD | | Malaysia |
| Coffey Mining Pty Ltd | | Australia |
| Coffey Myanmar Limited | | Myanmar |
| Coffey Natural Systems Pty Ltd | | Australia |
| Coffey Nigeria Ltd | | Nigeria |
| Coffey Philippines Inc | | Philippines |
| Coffey Projects (Africa) (Pty) Ltd | | South Africa |
| Coffey Projects (International) Ltd | | British Virgin Islands |
| Coffey Projects (Middle East) Ltd | | Bailiwick of Jersey |
| Coffey Projects (New Zealand) Limited | | New Zealand |
| Coffey Services Australia Pty Ltd | | Australia |
| Coffey Services No 2 Pty Ltd | | Australia |
| Coffey Services (NZ) Limited | | New Zealand |
| Coffey Services PNG Limited | | Papua New Guinea |
| Coffey Testing Pty Ltd | | Australia |
| Coffey Thailand Limited | | Thailand |
| Coffey UK Limited | | United Kingdom |
| Cornerstone Environmental Group, LLC | | New York |
| Cosentini Associates, Inc. | | New York |
| DASCEM Pty Ltd | | Australia |
| DCK-TTEC LLC | | Delaware |
| Development Company for Technical & Environmental Consultancy LLC | | Iraq |
| Delaney Crushed Stone Products, Inc. | | New York |
| Duncan Rhodes Construction Management (Pty) Ltd | | South Africa |
| Duncan Rhodes Procurement (Pty) Ltd | | South Africa |
| Eco Logical Australia Pty Ltd | | Australia |
| Farsands Solutions Pty Ltd | | Australia |
| Foothills Indemnity, Inc. | | Hawaii |
| Fundacion MSI Colombia | | Colombia |
| Geosciences Consulting (ME) Pty Ltd | | Australia |
| Glumac | | California |
| Glumac Limited, Inc. | | Hong Kong |
| Glumac (Shanghai) Architectural Design Consulting Co., Ltd. | | China |
| Golden Spike Resources, LLC | | Delaware |
| Golden State Brownfields, LLC | | Delaware |
| Hagler Bailly Pakistan (Private) Limited | | Pakistan |
| Hydro-Ops LLC | | Delaware |
| IJSI Liberia, LLC | | Liberia |
| INDUS Corporation | | Virginia |
| INDUS Enterprise Solutions Inc. | | Delaware |
| INDUS Secure Network Solutions, LLC | | Virginia |
| INDUS ESS LLC | | Virginia |
| Innogiciel Inc. | | Quebec, Canada |
| Integrated Justice Systems International, LLC | | Delaware |
| Inversiones Tetra Tech Chile Holding Limitada | | Chile |
| Inversiones Tetra Tech Chile Acquisition Limitada | | Chile |
| IP3 Afrique, LLC | | Senegal |
| IT Environmental (Australia) Pty Ltd | | Australia |
| KIFAYATE (SARLAU) | | Morocco |
| Kiggiak-EBA Consulting Ltd. | | Northwest Territories, Canada |
| Kitimaat - Tetratech General Partner Ltd. | | British Columbia, Canada |
| Kitimaat - Tetratech Limited Partnership | | British Columbia, Canada |
| MACSIS Pty Ltd | | Australia |
| Management Systems International Maroc S.A.R.L. | | Morocco |
| Management Systems International Georgia | | Georgia |
| Management Systems International, Inc. | | District of Columbia |
| Mansys International S de RL de CV | | Mexico |
| Metálica Consultores S.A. | | Chile |
| Mideast Construction LLC | | Delaware |
| MSI Egypt LLC | | Egypt |
| MSI for the development of competencies and management consultancy Ltd. | | Kurdistan |
| MSI Pakistan (Private) Limited | | Pakistan |
| Nehtruh-EBA Consulting Ltd. | | Northwest Territories, Canada |
| NELPCO Limited Partnership | | Yukon, Canada |
| NND EBA Land Protection Corp. | | Yukon, Canada |
| Park L Projects Ltd. | | British Columbia, Canada |
| Parkland Pipeline Contractors Ltd. | | Alberta, Canada |
| Parkland Pipeline Equipment Ltd. | | Alberta, Canada |
| Parkland Projects Ltd. | | Saskatchewan, Canada |
| PRO-telligent, LLC | | Delaware |
| PRO-telligent Global, LLC | | Virginia |
| PRO-telligent Global Limited, LLC | | Kenya |
| PRO-telligent Global (South) Limited | | Malawi |
| PRT-Liberia Incorporated | | Liberia |
| Proteus Engineers Pty Ltd. | | Australia |
| Rooney Engineering, Inc. | | Colorado |
| Secure Networx LLC | | Virginia |
| Sodat Inc. | | Quebec, Canada |
| Taheel Tetra Tech L.L.C. | | Saudi Arabia |
| Tetra Tech Alaska, L.L.C. | | Alaska |
| Tetra Tech AMT FZ LLC | | Fujairah, UAE |
| Tetra Tech ARD, Inc. S. de R.L. de C.V | | Mexico |
| Tetra Tech Australia Holding Pty Ltd. | | Australia |
| Tetra Tech Australia Pty Ltd | | Australia |
| Tetra Tech BAS, Inc. | | California |
| Tetra Tech (Beijing) Consultancy Company Limited | | China |
| Tetra Tech Canada Construction Inc. | | Canada |
| Tetra Tech Canada Holding Corporation | | Canada |
| Tetra Tech Canada Inc. | | Canada |
| Tetra Tech Cape Canaveral, LLC | | Florida |
| Tetra Tech CES, LLC | | Washington |
| Tetra Tech Coffey Consultoria e Servicos Ltda | | Brazil |
| Tetra Tech Coffey Holding LLC | | Delaware |
| Tetra Tech Coffey Holding Pty Limited | | Australia |
| Tetra Tech Colombia SAS | | Colombia |
| Tetra Tech Construction, Inc. | | New York |
| Tetra Tech Construction Craft Payroll LLC | | New York |
| Tetra Tech Construction National Payroll LLC | | Delaware |
| Tetra Tech Construction Oil & Gas Payroll, LLC | | Delaware |
| Tetra Tech Consultoria Ltda | | Brazil |
| Tetra Tech Contingency Constructors, LLC | | Delaware |
| Tetra Tech do Brasil Participacoes Ltda. | | Brazil |
| Tetra Tech EC, Inc. | | Delaware |
| Tetra Tech EMC, Inc. | | California |
| Tetra Tech Engenharia e Consultoria Ltda. | | Brazil |
| Tetra Tech ES, Inc. | | Delaware |
| Tetra Tech ES, Inc. S. de R.L. de C.V | | Mexico |
| Tetra Tech ES India Private Limited. | | India |
| Tetra Tech EU B.V. | | Netherlands |
| Tetra Tech Executive Services, Inc. | | California |
| Tetra Tech Expeditionary Operations, Inc. | | Delaware |
| Tetra Tech Facilities Construction, LLC | | New Jersey |
| Tetra Tech Holding LLC | | Delaware |
| Tetra Tech IC, Inc. | | Alberta, Canada |
| Tetra Tech IN Inc. | | Quebec, Canada |
| Tetra Tech India Limited | | India |
| Tetra Tech Industries Africa (pty) Ltd. | | South Africa |
| Tetra Tech Industries General Partner Inc. | | Canada |
| Tetra Tech International, Inc. | | Delaware |
| Tetra Tech International S.A.C. | | Peru |
| Tetra Tech MA, Inc. | | Delaware |
| Tetra Tech Management Consultancy LLC | | Oman |
| Tetra Tech New Martinsville, LLC | | Delaware |
| Tetra Tech MIMDU, LLC | | Delaware |
| Tetra Tech NZ Limited | | New Zealand |
| Tetra Tech QC Inc. | | Quebec, Canada |
| Tetra Tech QE Inc. | | Quebec, Canada |
| Tetra Tech QI Inc. | | Quebec, Canada |
| Tetra Tech RAC Craft, LLC | | Delaware |
| Tetra Tech TAS Inc. | | Ontario, Canada |
| Tetra Tech Technical Services, Inc. | | Delaware |
| Tetra Tech Tesoro, Inc. | | Virginia |
| Tetra Tech Utility Construction, Inc. | | Delaware |
| TTI Ring Industries Limited | | Jamaica |
| Wardrop (Ghana) Ltd. | | Ghana |
| Western Utility Cable, Inc. | | Illinois |
| Western Utility Central, Inc. | | Illinois |
| Western Utility Contractors, Inc. | | Illinois |
| Western Utility Electric, Inc. | | Illinois |
| Western Utility LLC | | Delaware |
| Whalen & Company, Inc. | | Delaware |
| Whalen Service Corps Inc. | | Delaware |
| 646696 NB Inc | | Canada |
| 646756 NB Inc. | | Canada |
