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Lettis Consultants International, Inc

Lettis Consultants International, Inc. is an earth science company formed by geologists, seismologists and engineers.

Civil Engineering
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Headquarters
Concord, California, United StatesSource: RevenueBaseRetrieved October 13, 2026
Employee range
11 to 50Source: RevenueBaseRetrieved October 13, 2026
Founded
2011Source: RevenueBaseRetrieved October 13, 2026
Published list appearances
8 supported appearances ↗Source: RevenueBase lists
The company at a glance

What does Lettis Consultants International, Inc do?

The company has worldwide experience in earthquake hazard analysis, engineering geology, geotechnical services, water resources, and licensing and regulatory strategy and compliance. The company has conducted studies supporting seismic analysis and design for critical facilities, including pipelines, dams, nuclear plants, hospitals, buildings and bridges.

Based on the company’s public LinkedIn information, supplied through RevenueBase.

What the business offers

Services & capabilities.

Engineering geology and hazard investigations

The company specializes in engineering geology and seismic and natural hazard investigations.

Source: LinkedIn company description · Retrieved October 13, 2026

Earth science consulting

The company offers Earth science consulting services to clients around the world.

Source: LinkedIn company description · Retrieved October 13, 2026

Explore the business in context

Company lists.

Supported appearances on published RevenueBase lists, including available memberships beyond displayed rankings.

Positions describe ordering within each source list. See how lists are built ↗

Share your recognition

Embeddable award for your website

BADGE PREVIEWLettis Consultants International, Inc listed #3 on Engineering consultancies, September 23, 2026Open the published source list.
Lettis Consultants International, Inc

#3 Engineering consultancies

Snapshot: September 23, 2026

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Company information

Sources & data notes.

RevenueBase prepared this profile from the company’s public LinkedIn information and RevenueBase company data. These source records were retrieved on October 13, 2026. AI helped summarize these sources, with a separate automated check against the source text completed on November 3, 2026. Directory positions use company-contact counts from separate saved list snapshots dated September 19, 2026, September 21, 2026, September 23, 2026, September 26, 2026 and September 27, 2026. How the company lists are built.

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