EX-21 2 ttek-ex21x10012018xsingles.htm EXHIBIT 21 Exhibit
Exhibit 21


Subsidiaries of Tetra Tech, Inc.
 
 
 
NAME
 
JURISDICTION OF FORMATION
Advanced Management Technology, Inc.
 
Virginia
American Environmental Group, Ltd.
 
Ohio
America's Schoolhouse Consulting Services, Inc.
 
New York
ARD, Inc.
 
Vermont
Ardaman & Associates, Inc.
 
Florida
BIOCNG, LLC
 
New York
Coffey UK Limited
 
United Kingdom
Cornerstone Environmental Group, LLC
 
New York
Cosentini Associates, Inc.
 
New York
Delaney Crushed Stone Products, Inc.
 
New York
Foothills Indemnity, Inc.
 
Hawaii
Fort Point Associates, Inc.
 
Massachusetts
Glumac
 
California
Hydro-Ops LLC
 
Delaware
INDUS Corporation
 
Virginia
Integrated Justice Systems International, LLC
 
Delaware
Management Systems International, Inc.
 
District of Columbia
PRO-telligent, LLC
 
Delaware
Rooney Engineering, Inc.
 
Colorado
Tetra Tech Alaska, L.L.C.
 
Alaska
Tetra Tech Australia Pty Ltd
 
Australia
Tetra Tech BAS, Inc.
 
California
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 Construction, Inc.
 
New York
Tetra Tech EC, Inc.
 
Delaware
Tetra Tech EMC, Inc.
 
California
Tetra Tech ES, Inc.
 
Delaware
Tetra Tech Executive Services, Inc.
 
California
Tetra Tech Expeditionary Operations, Inc.
 
Delaware
Tetra Tech Holding LLC
 
Delaware
Tetra Tech IC, Inc.
 
Alberta, Canada
Tetra Tech International, Inc.
 
Delaware
Tetra Tech MA, Inc.
 
Delaware
Tetra Tech MIMDU, LLC
 
Delaware
Tetra Tech New Martinsville, LLC
 
Delaware
Tetra Tech Technical Services, Inc.
 
Delaware
Tetra Tech Tesoro, Inc.
 
Virginia


Exhibit 21


Whalen & Company, Inc.
 
Delaware
Whalen Service Corps Inc.
 
Delaware