Alahesh Thurairajah

President and Principal

About

Alahesh Thurairajah

Mr. Thurairajah is responsible for managing and delivering highway and bridge projects. With more than fifteen years of experience, he has provided geotechnical design and construction recommendations for over 400 bridges, more than 500 standard and nonstandard retaining walls, and more than 300 miles of roadway. He has prepared Structure Preliminary Geotechnical Reports; Preliminary and Final Foundation Reports; District Preliminary Geotechnical Reports; Geotechnical Design Reports; and Preliminary and Final Materials Reports in compliance with California Department of Transportation (Caltrans) standards for numerous bridge and freeway projects during the PA/ED and PS&E phases.

Having successfully delivered projects from PA/ED through PS&E and construction, Mr. Thurairajah has a thorough understanding of the Caltrans project delivery process. His technical expertise includes foundation design, earth-retaining structure design, seismic hazard evaluations, liquefaction assessment, slope-stability analyses, pavement structural section design, ADL studies, and pile-drivability studies. He has managed several large transportation projects and is known for delivering high-quality work on accelerated schedules.

Mr. Thurairajah earned his M.S. in civil engineering from the University of California, Los Angeles, and is a registered civil and geotechnical engineer in California.

Rest of Our Team

Have a question? Want to work with us?

Have a question? Want to work with us?

Have a question? Want to work with us?

Fountain Valley (Head office)

17800 Newhope Street
Suite B
Fountain Valley, CA 92708
(714) 751-3826

Inland Empire

765 North Main Street
Suite 136
Corona, CA 92878
(951) 382-9150

San Francisco Bay Area

3541 Investment Boulevard
Suite 4
Hayward, CA 94545
(510) 562-8833

San Diego

820 Los Vallecitos Boulevard
Suite H
San Marcos, CA 92069
(760) 736-8222

Ⓒ2025, Earth Mechanics. All rights reserved.

At Earth Mechanics Inc. (EMI), your privacy is our priority. We do not collect or use your personal information for marketing purposes. All communications via SMS are strictly conversational in nature and initiated based on your interactions with EMI.

By providing your phone number, you consent to receive occasional, conversational SMS messages from Earth Mechanics Inc. Message frequency may vary, with an average of 1–2 messages per month. SMS numbers are never sold, shared, or disclosed to third parties without your explicit consent, except as required by law. All personal data, including SMS correspondence, is stored securely and handled in accordance with our privacy standards. We do not transfer your information to external organizations under any circumstances unrelated to legal compliance.

This website may include embedded content (e.g., videos, images, or articles) from third-party websites. Such content behaves as if you visited the third-party site directly. These websites may collect data, use cookies, and track your interaction with the embedded content—especially if you are logged in to their platform.

Some media assets used on this site, including video content, are licensed from Adobe Stock under appropriate licensing terms. These assets are used in compliance with Adobe’s Enhanced License, and no attribution is required.

If you have any questions about this policy or your data privacy, please contact us at info@earthmech.com.

Fountain Valley (Head office)

17800 Newhope Street
Suite B
Fountain Valley, CA 92708
(714) 751-3826

Inland Empire

765 North Main Street
Suite 136
Corona, CA 92878
(951) 382-9150

San Francisco Bay Area

3541 Investment Boulevard
Suite 4
Hayward, CA 94545
(510) 562-8833

San Diego

820 Los Vallecitos Boulevard
Suite H
San Marcos, CA 92069
(760) 736-8222

Ⓒ2025, Earth Mechanics. All rights reserved.

At Earth Mechanics Inc. (EMI), your privacy is our priority. We do not collect or use your personal information for marketing purposes. All communications via SMS are strictly conversational in nature and initiated based on your interactions with EMI.

By providing your phone number, you consent to receive occasional, conversational SMS messages from Earth Mechanics Inc. Message frequency may vary, with an average of 1–2 messages per month. SMS numbers are never sold, shared, or disclosed to third parties without your explicit consent, except as required by law. All personal data, including SMS correspondence, is stored securely and handled in accordance with our privacy standards. We do not transfer your information to external organizations under any circumstances unrelated to legal compliance.

This website may include embedded content (e.g., videos, images, or articles) from third-party websites. Such content behaves as if you visited the third-party site directly. These websites may collect data, use cookies, and track your interaction with the embedded content—especially if you are logged in to their platform.

Some media assets used on this site, including video content, are licensed from Adobe Stock under appropriate licensing terms. These assets are used in compliance with Adobe’s Enhanced License, and no attribution is required.

If you have any questions about this policy or your data privacy, please contact us at info@earthmech.com.

Fountain Valley (Head office)

17800 Newhope Street
Suite B
Fountain Valley, CA 92708
(714) 751-3826

Inland Empire

765 North Main Street
Suite 136
Corona, CA 92878
(951) 382-9150

San Francisco Bay Area

3541 Investment Boulevard
Suite 4
Hayward, CA 94545
(510) 562-8833

San Diego

820 Los Vallecitos Boulevard
Suite H
San Marcos, CA 92069
(760) 736-8222

Ⓒ2025, Earth Mechanics. All rights reserved.

At Earth Mechanics Inc. (EMI), your privacy is our priority. We do not collect or use your personal information for marketing purposes. All communications via SMS are strictly conversational in nature and initiated based on your interactions with EMI.

By providing your phone number, you consent to receive occasional, conversational SMS messages from Earth Mechanics Inc. Message frequency may vary, with an average of 1–2 messages per month. SMS numbers are never sold, shared, or disclosed to third parties without your explicit consent, except as required by law. All personal data, including SMS correspondence, is stored securely and handled in accordance with our privacy standards. We do not transfer your information to external organizations under any circumstances unrelated to legal compliance.

This website may include embedded content (e.g., videos, images, or articles) from third-party websites. Such content behaves as if you visited the third-party site directly. These websites may collect data, use cookies, and track your interaction with the embedded content—especially if you are logged in to their platform.

Some media assets used on this site, including video content, are licensed from Adobe Stock under appropriate licensing terms. These assets are used in compliance with Adobe’s Enhanced License, and no attribution is required.

If you have any questions about this policy or your data privacy, please contact us at info@earthmech.com.

Fountain Valley (Head office)

17800 Newhope Street
Suite B
Fountain Valley, CA 92708
(714) 751-3826

Inland Empire

765 North Main Street
Suite 136
Corona, CA 92878
(951) 382-9150

San Francisco Bay Area

3541 Investment Boulevard
Suite 4
Hayward, CA 94545
(510) 562-8833

San Diego

820 Los Vallecitos Boulevard
Suite H
San Marcos, CA 92069
(760) 736-8222

Ⓒ2025, Earth Mechanics. All rights reserved.

At Earth Mechanics Inc. (EMI), your privacy is our priority. We do not collect or use your personal information for marketing purposes. All communications via SMS are strictly conversational in nature and initiated based on your interactions with EMI.

By providing your phone number, you consent to receive occasional, conversational SMS messages from Earth Mechanics Inc. Message frequency may vary, with an average of 1–2 messages per month. SMS numbers are never sold, shared, or disclosed to third parties without your explicit consent, except as required by law. All personal data, including SMS correspondence, is stored securely and handled in accordance with our privacy standards. We do not transfer your information to external organizations under any circumstances unrelated to legal compliance.

This website may include embedded content (e.g., videos, images, or articles) from third-party websites. Such content behaves as if you visited the third-party site directly. These websites may collect data, use cookies, and track your interaction with the embedded content—especially if you are logged in to their platform.

Some media assets used on this site, including video content, are licensed from Adobe Stock under appropriate licensing terms. These assets are used in compliance with Adobe’s Enhanced License, and no attribution is required.

If you have any questions about this policy or your data privacy, please contact us at info@earthmech.com.