inactivebranchTETRA TECH MI INC.
(Virginia (US), 24 FRANK LLOYD WRIGHT DR., LOBBY B, SUITE 1200, ANN ARBOR, MI, 48105)
inactivebranchTETRA TECH RICHARDSON INC.
(Virginia (US), 910 S CHAPEL ST, NEWARK, Delaware, 19713-0000)
Previously/Alternatively known as TETRA TECH RICHARDSON INCORPORATED
branchTetra Tech EC, Inc.
(Virginia (US), 3475 E Foothill Blvd, Pasadena, California, 91107-6024)
Previously/Alternatively known as TETRA TECH FW INCORPORATED
inactivebranchTetra Tech EM Inc.
(Virginia (US), 1 SOUTH WACKER DRIVE, 37TH FLOOR, CHICAGO, Illinois, 60601-0000)
branchTetra Tech EMC, Inc.
(Virginia (US), 3475 E Foothill Blvd, Pasadena, California, 91107-6024)
inactivebranchTetra Tech ENE, Inc.
(Virginia (US), 4701 COX RD STE 301, GLEN ALLEN VA 23060)
branchTetra Tech ES, Inc.
(Virginia (US), 3475 E FOOTHILL BLVD, PASADENA, California, 91107-0000)
inactivebranchTetra Tech MA, Inc.
(Virginia (US), 3475 E FOOTHILL BLVD, PASADENA, California, 91107-0000)
inactivebranchTetra Tech NUS, Inc.
(Virginia (US), 3475 E FOOTHILL BLVD, PASADENA, California, 91107-0000)
inactivebranchTetra Tech Rizzo, Inc.
(Virginia (US), ONE GRANT STREET, FRAMINGHAM, Massachusetts, 01701-0000)
Tetra Tech Tesoro, Inc.
(Virginia (US), 5250 Challedon Dr, Virginia Beach, Virginia, 23462-6304)
branchTetra Tech, Inc.
(Virginia (US), 3475 E FOOTHILL BLVD, PASADENA, California, 91107)
Previously/Alternatively known as TETRA TECH EXPEDITIONARY OPERATIONS HENRICO CO