Exhibit 21
Subsidiaries of Tetra Tech, Inc.
NAME |
| JURISDICTION OF FORMATION |
Advanced Management Technology, Inc. |
| Virginia |
AEG West, Inc. |
| California |
America’s Schoolhouse Consulting Services, Inc. |
| New York |
American Environmental Group, Ltd. |
| Ohio |
ARD, Inc. |
| Vermont |
Ardaman & Associates, Inc. |
| Florida |
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 e Servicos Ltda |
| Brazil |
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 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, 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 (Australia) Pty Ltd |
| Australia |
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 |
Farsands Risk Management Pty Ltd |
| Australia |
Farsands Solutions Pty Ltd |
| Australia |
Foothills Indemnity, Inc. |
| Hawaii |
Fundacion MSI Colombia |
| Colombia |
Geosciences Consulting (ME) Pty Ltd |
| Australia |
Global Justice Solutions Pty Ltd |
| Australia |
Hagler Bailly Pakistan (Private) Limited |
| Pakistan |
Hydro-Ops LLC |
| Delaware |
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 |
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 |
Management Systems International Iraq |
| Iraq |
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 Equipment Ltd. |
| Alberta, Canada |
Parkland Pipeline Contractors 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 |
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 Argentina S. A. |
| Argentina |
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 Construction LP |
| Ontario, 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 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 Minerios e Metais Ltda. |
| Brazil |
Tetra Tech do Brasil Participacoes Ltda. |
| Brazil |
Tetra Tech EBA Inc. |
| Alberta, Canada |
Tetra Tech EC, Inc. |
| Delaware |
Tetra Tech EMC, Inc. |
| California |
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 NZ Limited |
| New Zealand |
Tetra Tech OGD Inc. |
| British Columbia, Canada |
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 Sustentabilidade Serviços De Engenharia Consultiva Ltda. |
| Brazil |
Tetra Tech TAS Inc. |
| Ontario, Canada |
Tetra Tech Technical Services, Inc. |
| Delaware |
Tetra Tech Tesoro, Inc. |
| Virginia |
Tetra Tech Utility Construction, Inc. |
| Delaware |
Tetra Tech WEI Inc. |
| Canada |
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 |