What departments does Tetra Tech have?

Tetra Tech has employees across 4 departments including Engineering, Marketing, Finance, Arts & Design.

What is the largest department at Tetra Tech?

The largest department at Tetra Tech is Engineering with 2 employees.

Where are Tetra Tech employees located globally?

Tetra Tech has employees across 7 continents and 134 countries including Mozambique, Zimbabwe, Algeria, Côte D'ivoire, Rwanda.

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

Tetra Tech's team has decreased from approximately 16K to 11K 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
12K

United States Of America
9.5K
Canada
2.4K
Mexico
17
Haiti
8
Guatemala
7
Honduras
2
Dominican Republic
2
Trinidad And Tobago
1
El Salvador
1
Panama
1
Costa Rica
1

Europe
1.2K

United Kingdom Of Great Britain And Northern Ireland
899
Ukraine
78
Ireland
44
Netherlands
42
Germany
26
France
12
Italy
12
Bosnia And Herzegovina
7
Armenia
7
Spain
6
Serbia
6
Poland
5
Georgia
4
Belgium
3
Norway
3
Sweden
3
Moldova
3
Albania
2
Austria
2
Greece
2
Estonia
1
Azerbaijan
1
Bulgaria
1
Switzerland
1
Romania
1
Montenegro
1
Denmark
1
Croatia
1
Latvia
1

Asia
525

India
94
Indonesia
85
Afghanistan
60
Saudi Arabia
35
Jordan
25
Philippines
24
Viet Nam
21
Pakistan
18
Lao People's Democratic Republic
18
Thailand
17
Cambodia
15
Bangladesh
15
Mongolia
14
Kazakhstan
10
Iraq
9
United Arab Emirates
9
Malaysia
7
Turkey
6
China
6
Israel
5
Kuwait
5
Sri Lanka
4
Syrian Arab Republic
4
Qatar
3
Japan
3
Nepal
2
Tajikistan
2
Russian Federation
2
Kyrgyzstan
1
Iran
1
Uzbekistan
1
Oman
1
Singapore
1
Lebanon
1
Maldives
1

South America
397

Brazil
350
Colombia
31
Chile
5
Ecuador
4
Peru
3
Argentina
1
Paraguay
1
Guyana
1
Venezuela
1

Africa
231

South Africa
20
Rwanda
17
Tanzania
17
Egypt
16
Liberia
15
Zimbabwe
14
Nigeria
14
Ghana
14
Mali
12
Kenya
12
Zambia
12
Côte D'ivoire
11
Ethiopia
11
Uganda
6
South Sudan
5
Mozambique
4
Malawi
4
Sierra Leone
3
Tunisia
3
Cameroon
3
Morocco
3
Central African Republic
2
Djibouti
2
Madagascar
2
Benin
2
Algeria
1
Botswana
1
Sudan
1
Guinea
1
Libya
1
Senegal
1
Burundi
1

Oceania
206

Australia
154
Fiji
23
New Zealand
10
Papua New Guinea
9
Solomon Islands
4
Kiribati
3
Micronesia
1
Vanuatu
1
Tuvalu
1

Tetra Tech's Leadership

P. A.
Chief Executive Officer
Mobile Phone
Email
G. C.
Chief Technology Officer | 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

Location

Last Update

H. L.
Chairman
Mobile Phone
Email
Oct 22, 2024
H. G.
President
Mobile Phone
Email
Oct 16, 2024
J. E.
Chief Financial Officer Cfo)
Mobile Phone
Email
Oct 17, 2024
J. J.
Partner
Mobile Phone
Email
Oct 21, 2024
J. T.
Owner
Mobile Phone
Email
Oct 23, 2024
J. W.
Owner
Mobile Phone
Email
Oct 21, 2024
K. R.
Owner
Mobile Phone
Email
Oct 22, 2024
K. D.
President
Mobile Phone
Email
Oct 17, 2024
K. P.
President
Mobile Phone
Email
Oct 23, 2024
L. S.
Owner
Mobile Phone
Email
Oct 17, 2024

Frequently Asked Questions

What is Tetra Tech known for?

Tetra Tech operates in the Civil Engineering industry. You can contact Tetra Tech's 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 First.Last@tetratech.com. 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 28K employees as of October 2026. These team members are located across 6 continents, including North America, Europe and Asia.

Who are Tetra Tech's key employees and leadership?

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

Chief Executive Officer: P. A.
Chief Technology Officer | 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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