What departments does Tetra Tech have?

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

What is the largest department at Tetra Tech?

The largest department at Tetra Tech is Operations with 3 employees.

Where are Tetra Tech employees located globally?

Tetra Tech has employees across 7 continents and 132 countries including Côte D'ivoire, South Africa, Kenya, Ghana, Egypt.

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
9.3K
Canada
2.4K
Mexico
12
Haiti
8
Guatemala
6
Honduras
2
Trinidad And Tobago
1
Dominican Republic
1
El Salvador
1
Costa Rica
1
Panama
1

Europe
1.1K

United Kingdom Of Great Britain And Northern Ireland
827
Ukraine
79
Netherlands
35
Ireland
34
Germany
23
Italy
11
France
9
Armenia
7
Bosnia And Herzegovina
7
Serbia
6
Spain
6
Poland
5
Georgia
4
Moldova
4
Sweden
3
Norway
3
Belgium
3
Austria
2
Albania
2
Greece
2
Estonia
1
Montenegro
1
Romania
1
Croatia
1
Azerbaijan
1
Bulgaria
1
Switzerland
1
Denmark
1

Asia
467

India
91
Indonesia
72
Afghanistan
55
Saudi Arabia
25
Jordan
24
Philippines
22
Lao People's Democratic Republic
17
Cambodia
16
Pakistan
16
Viet Nam
14
Bangladesh
13
Mongolia
13
Thailand
12
Kazakhstan
10
Iraq
9
United Arab Emirates
7
Malaysia
6
China
6
Turkey
5
Kuwait
5
Sri Lanka
4
Qatar
3
Syrian Arab Republic
3
Japan
3
Israel
3
Russian Federation
2
Tajikistan
2
Kyrgyzstan
1
Oman
1
Timor-leste
1
Uzbekistan
1
Iran
1
Maldives
1
Singapore
1
Lebanon
1
Nepal
1

South America
380

Brazil
336
Colombia
30
Chile
4
Peru
3
Ecuador
3
Guyana
1
Argentina
1
Paraguay
1
Venezuela
1

Africa
210

South Africa
20
Tanzania
16
Zimbabwe
15
Liberia
14
Nigeria
13
Kenya
12
Ghana
12
Zambia
12
Egypt
11
Mali
11
Ethiopia
11
Côte D'ivoire
10
Rwanda
10
Uganda
6
South Sudan
5
Mozambique
4
Malawi
4
Sierra Leone
3
Cameroon
3
Tunisia
3
Djibouti
2
Madagascar
2
Benin
2
Morocco
2
Botswana
1
Senegal
1
Sudan
1
Guinea
1
Central African Republic
1
Libya
1
Burundi
1

Oceania
198

Australia
152
Fiji
20
Papua New Guinea
9
New Zealand
7
Solomon Islands
4
Kiribati
3
Micronesia
1
Vanuatu
1
Tuvalu
1

Tetra Tech's Leadership

P. A.
Chief Executive Officer
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
S. D.
President, Tetra Tech Qe Inc
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

M. S.
President, Asia Pacific Division
Mobile Phone
Email
Australia, Victoria
Sep 01, 2026
J. J.
President, Cbi Operating Unit
Mobile Phone
Email
Sep 01, 2026
C. H.
Divison President
Mobile Phone
Email
United Kingdom
Jun 28, 2026
E. S.
Operating Unit President (iae)
Mobile Phone
Email
Canada, Manitoba
Aug 13, 2026
P. C. L.
Engenheiro Hídrico Sênior
Mobile Phone
Email
Brazil, São Paulo
Aug 28, 2026
V. P.
Subject Matter Expert: Police Communications / Pio
Mobile Phone
Email
Haiti
Aug 22, 2026
P. L.
Président
Mobile Phone
Email
Canada, Quebec
Jun 28, 2026
M. N.
Manager Of Administration And Executive Assistant To The Operating Unit President
Mobile Phone
Email
Canada, Ontario
Jul 06, 2026
S. D.
President, Tetra Tech Qe Inc
Mobile Phone
Email
Canada, Quebec
Jun 28, 2026
S. M.
Owner's Engineer
Mobile Phone
Email
Canada, Ontario
Sep 02, 2026

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 27K employees as of August 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 August 2026, Tetra Tech's key employees include:

Chief Executive Officer: P. A.
Chief Marketing Officer: O. S.
Chief Technical Officer: D. M.
Chief Financial Officer: C. H.
Chief Financial Officer Cfo): J. E.

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Tetra Tech Employee Directory

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