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Contact Us

Below is a list of frequently asked questions to help you find what you are looking for.

If you can’t find the answer you need, reach out to us using the form, get in touch through phone or email, or find an office location near you.

Current and previous employees

To obtain your employment verification, please use The Work Number, an automated service from Equifax that helps you quickly provide proof of your employment or income. The Work Number is widely used by mortgage lenders, banks, apartment complexes, and others who may need your proof of employment or income.

To obtain verification online:

  1. Go to theworknumber.com
  2. Select “Log In,” then “View My Data”
  3. Enter the following information to continue and register your account:
    • Tetra Tech Employer Code: 12295
    • Your name, Social Security Number, and date of birth
  4. Follow the prompts to complete your account registration

You also can contact The Work Number’s Client Service Center by phone from 7 a.m. to 8 p.m. Central Time, Monday to Friday at +1 (800) 996-7566. For TTY – Deaf, please contact +1 (800) 424-0253.

To obtain your employment verification, please contact your local Human Resources representative and request an employment verification letter, which will be provided on company letterhead.

Please contact our Talent Acquisition Team at [email protected].

To get a copy of your W2, please contact [email protected].

For questions regarding your 401k plan, contact Principal at principal.com or call +1 (800) 547-7754. If they are unable to assist you, please contact Kevin McDonald at [email protected].

Job seekers

Available positions and internships are updated daily on our Careers page. If you don’t find what you’re looking for, please check back regularly. Set up a job alert to be notified about our latest openings.

We encourage you to apply even if you don’t meet every qualification. We look at every applicant and resume received.
To search for opportunities within disaster recovery, please visit our Disaster Recovery jobs page.

After you’ve submitted your application, a recruitment specialist will review your resume. If your experience closely matches the position’s requirements, we will contact you by email or phone to discuss your background in more detail. If a more qualified candidate is selected, your resume will remain in our application system for potential consideration for other open positions.

Please be patient as it takes time to fill a position. If a position is listed on the Careers page, it is available, and every resume submitted will be reviewed. Please do not submit your resume more than once for the same job. Due to the high volume of applicants, we are unable to respond to individual inquiries.

To check the status of your application, please log into our application system. Go to My Submissions and My Jobpage to view your application status. For more FAQs, go to dos5.net/careers/faqs.
Please go to dos5.net/careers/faqs for instructions.

General questions

Please contact [email protected].

People with disabilities who need assistance can review our disability information and contact us here: Disability Assistance. If you need further assistance, please contact Janet Brunner, Human Resources Division Director, at +1 (626) 470-2508.

People with limited English proficiency who need assistance can contact Janet Brunner, Human Resources Division Director, at +1 (626) 470-2508 or [email protected].
Any incidents or ethics violations should be reported using one of the following options:
  • Visit Tetra Tech’s anonymous online reporting portal at tetratech.ethicspoint.com
  • Call Tetra Tech’s anonymous, 24-hour-a-day Ethics Hotline at +1 (800) 886-2577 (United States) or find your local, non-U.S. hotline number at tetratech.ethicspoint.com

Corporate headquarters

3475 East Foothill Boulevard
Pasadena, California 91107-­6024, USA

P +1 (626) 351-4664
F +1 (626) 351-5291
[email protected]

Media and public relations

Charlie MacPherson
3475 East Foothill Boulevard
Pasadena, California 91107-­6024, USA

+1 (626) 470-2439
[email protected]

Investor relations

Jim Wu
3475 East Foothill Boulevard
Pasadena, California 91107-­6024, USA

+1 (626) 470-2844
[email protected]

Get in touch with us

Due to the high volume of inquiries we receive, we may not be able to answer all of them. Before you complete our contact form, please review our frequently asked questions above. If you have any other inquiries that were not answered above, please fill out this form.

Tetra Tech ensures nondiscrimination in all programs and activities in accordance with Title VI of the Civil Rights Act of 1964. For more information, or special assistance for persons with disabilities or limited English proficiency, contact Janet Brunner, Human Resources Division Director, at +1 (626) 470-2508.

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