What departments does Tetra Tech have?

Tetra Tech has employees across 8 departments including Engineering, Operations, Military & Protective Services, Information Technology, Marketing.

What is the largest department at Tetra Tech?

The largest department at Tetra Tech is Entrepreneurship with 17 employees.

Where are Tetra Tech employees located globally?

Tetra Tech has employees across 7 continents and 133 countries including Liberia, Zimbabwe, South Africa, Ghana, Nigeria.

How has Tetra Tech's team size changed over time?

Tetra Tech's team has decreased from approximately 16K to 10K employees based on available data.

Tetra Tech Employee Directory

Civil EngineeringCalifornia, United States10001+ Employees

Tetra Tech is a civil engineering consulting firm focused on water, environment, and sustainable infrastructure, providing engineering and advisory services for projects worldwide. The company is headquartered at 3475 East Foothill Boulevard, Pasadena, California 91107, United States. It reports a large global workforce of more than 10,000 employees. Recent news highlights engagements with Chelan PUD for a hydropower spillway modernization project, a master services agreement with the Port of Los Angeles, and a PipeUP collaboration with Yorkshire Water. The company maintains a website at tetratech.com.

Tetra Tech Global Highlights

North America
11K

United States Of America
8.9K
Canada
2.5K
Mexico
15
Guatemala
11
Haiti
7
El Salvador
3
Costa Rica
2
Dominican Republic
2
Honduras
1
Trinidad And Tobago
1
Panama
1

Europe
1.1K

United Kingdom Of Great Britain And Northern Ireland
836
Ukraine
84
Ireland
28
Netherlands
26
Germany
22
France
10
Italy
9
Spain
8
Poland
7
Armenia
7
Bosnia And Herzegovina
7
Serbia
6
Moldova
4
Belgium
3
Georgia
3
Greece
2
Croatia
2
Norway
2
Montenegro
2
Austria
2
Switzerland
1
Bulgaria
1
Albania
1
Sweden
1
Romania
1
Estonia
1
Denmark
1
Azerbaijan
1

Asia
476

Afghanistan
90
Indonesia
70
India
70
Jordan
25
Philippines
20
Pakistan
18
Lao People's Democratic Republic
18
Saudi Arabia
18
Cambodia
17
Mongolia
15
Bangladesh
13
Viet Nam
13
Thailand
13
Iraq
12
Kazakhstan
11
United Arab Emirates
7
Sri Lanka
5
China
5
Kuwait
4
Malaysia
4
Israel
3
Syrian Arab Republic
3
Japan
3
Uzbekistan
3
Turkey
3
Maldives
2
Tajikistan
2
Timor-leste
1
Oman
1
Iran
1
Singapore
1
Nepal
1
Qatar
1
Lebanon
1
Russian Federation
1
Kyrgyzstan
1

South America
447

Brazil
393
Colombia
37
Chile
6
Ecuador
5
Peru
2
Guyana
1
Venezuela
1
Paraguay
1
Argentina
1

Africa
232

South Africa
21
Tanzania
19
Liberia
17
Ethiopia
17
Nigeria
16
Côte D'ivoire
15
Zimbabwe
14
Ghana
14
Kenya
14
Egypt
13
Zambia
12
Mali
12
Rwanda
5
South Sudan
5
Malawi
5
Uganda
5
Madagascar
4
Sierra Leone
3
Tunisia
3
Mozambique
3
Benin
3
Libya
2
Cameroon
2
Guinea
1
Senegal
1
Niger
1
Botswana
1
Djibouti
1
Sudan
1
Central African Republic
1
Morocco
1

Oceania
215

Australia
164
Fiji
22
Papua New Guinea
10
New Zealand
8
Solomon Islands
4
Kiribati
3
Vanuatu
2
Micronesia
1
Tuvalu
1

Tetra Tech's Leadership

P. A.
Chief Executive Officer
Mobile Phone
Email
G. C.
Cto | Diretor Comercial
Mobile Phone
Email
O. S.
Chief Marketing Officer
Mobile Phone
Email
D. M.
Chief Technical Officer
Mobile Phone
Email
C. H.
Chief Financial Officer
Mobile Phone
Email
J. E.
Chief Financial Officer Cfo)
Mobile Phone
Email
M. S.
President, Asia Pacific Division
Mobile Phone
Email
J. J.
President, Cbi Operating Unit
Mobile Phone
Email

Tetra Tech Employee Metrics

100%

50%

0%

2026

2025

Engineering
Program & Project Management
Research
Analytics
Consultant
Other
Arts & Design
Administrative
Biotechnology

Contact profiles from Tetra Tech

Name

Title

Contact Info

Location

Last Update

G. C.
Cto | Diretor Comercial
Mobile Phone
Email
BrazilSão Paulo
Jul 18, 2026
M. S.
President, Asia Pacific Division
Mobile Phone
Email
AustraliaVictoria
Jun 28, 2026
J. J.
President, Cbi Operating Unit
Mobile Phone
Email
Jun 29, 2026
C. H.
Divison President
Mobile Phone
Email
United Kingdom
Jun 28, 2026
E. S.
Operating Unit President (iae)
Mobile Phone
Email
CanadaManitoba
Jun 30, 2026
P. C. L.
Engenheiro Hídrico Sênior
Mobile Phone
Email
BrazilSão Paulo
Jun 28, 2026
V. P.
Subject Matter Expert: Police Communications / Pio
Mobile Phone
Email
Haiti
Oct 27, 2025
P. L.
Président
Mobile Phone
Email
CanadaQuebec
Jun 28, 2026
M. N.
Manager Of Administration And Executive Assistant To The Operating Unit President
Mobile Phone
Email
CanadaOntario
Jul 06, 2026
S. D.
President, Tetra Tech Qe Inc
Mobile Phone
Email
CanadaQuebec
Jun 28, 2026

Frequently Asked Questions

What is Tetra Tech known for?

Tetra Tech operates in the Civil Engineering industry; you can contact the main corporate office by phone at

+1-626-351-****

. Explore Tetra Tech's company overview page for more information.

What is Tetra Tech's most common email format?

Tetra Tech employees' email format typically follows the pattern of . Trying to find reliable and up-to-date employee contact data? Find more Tetra Tech email formats with LeadIQ.

How many employees does Tetra Tech have currently?

Tetra Tech has approximately 27K employees as of July 2026. These team members are located across 6 continents, including North AmericaEuropeAsia.

Who are Tetra Tech's key employees and leadership?

As of July 2026, Tetra Tech's key employees include:

Chief Executive Officer: P. A.
Cto | Diretor Comercial: G. C.
Chief Marketing Officer: O. S.
Chief Technical Officer: D. M.
Chief Financial Officer: C. H.

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Tetra Tech Employee Directory

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