Lettis Consultants International Inc.

Lettis Consultants International Inc., a California-based small business specializing in geological and seismological consulting services, delivers earthquake hazard assessment, paleoseismology, geotechnical engineering, and dam and levee safety support to federal agencies primarily as a prime contractor (88% of recent awards) and secondarily as a subcontractor on architect-engineer projects. The firm operates from Concord, California, and competes predominantly in full-and-open procurements without set-aside designation.

Lettis's customer base centers on two federal agencies that account for 100% of the combined potential value in the source's coverage. The U.S. Army Corps of Engineers dominates the portfolio by dollar magnitude: USACE prime awards total $75.1 million combined potential value, anchored by a $75 million Indefinite Delivery/Indefinite Quantity contract for architect-engineer professional services supporting the Risk Management Center's dam and levee safety programs, awarded January 30, 2026, with performance extending through January 29, 2031. USACE's Engineering District Louisville has placed an additional six awards worth $16.3 million combined potential value for delivery orders including geotechnical investigation (hollow stem auger borings and utility pothole work in Brea, California, $95 thousand), software calibration and scour analysis for a dam pop modification project ($469 thousand), and safety assurance reviews for the Norfolk Coastal Storm Risk Management project and related infrastructure sites ($351 thousand). The U.S. Geological Survey's Office of Acquisitions and Grants has funded 15 federal grants worth funding spanning paleoseismic investigations, tectonic geomorphic mapping, seismic hazard modeling, and earthquake characterization research on faults in Utah, California, and North Carolina, including the Working Group on Utah Earthquake Probabilities 2 project (May 2024 through May 2026) and exploratory paleoseismic investigations of the Quin Sabe Fault in San Benito County, California (April 2023 through March 2026).

Activity has remained modest over the last five years—ranging from two awards in 2024 to six in 2023—with only two awards (combined potential value $386 thousand) reaching ultimate completion in the next twenty-four months and therefore facing recompete risk. Recent grant work includes federally funded research into conditional probability of distributed surface rupture using the Fault Displacement Hazard Initiative database (September 2025 through August 2026), regional shear-wave velocity randomization modeling for the Central and Eastern U.S. (September 2022 through August 2025), and site response analysis following the 2020 Magna earthquake west of Salt Lake City (June 2022 through August 2023). In its subcontractor role, Lettis provides seismic hazard analysis and technical services to HDR-Gannett Fleming JV on the USACE Mobile Rio Indio Reservoir and Water Transfer Project in Panama City, Panama (January 2026), seismic expertise to Schnabel-HDR Joint Venture for the Greers Ferry Dam Risk Assessment and Issue Evaluation Study Report (January 2026), and peer review and seismic hazard analysis to HDR Schnabel Reclamation Joint Venture on the Shasta dam seismic loadings technical review (October 2025) and San Joaquin River Basin closure structure work in Stockton, California (October 2025). Lettis holds a position under the $15 million Indefinite Delivery Contract W912QR21D0013 with USACE, from which it placed seven delivery orders worth $1.4 million combined potential value prior to the January 2026 replacement IDIQ vehicle. The firm's capability portfolio is characterized by specialized expertise in paleoseismology, geotechnical field investigation, seismic hazard analysis, and critical infrastructure safety assessment, with work performed across the United States and select international sites where USACE has water resource and disaster-risk-reduction missions.

Lettis Consultants International, Inc. (LCI) offers high-technology, innovative Earth science consulting services to clients around the world. LCI geologists, seismologists, and engineers have comprehensive worldwide experience providing earthquake hazard analyses, engineering geology, GIS analyses, remote sensing, drone mapping and geotechnical services, water resources expertise, and licensing and regulatory strategy and compliance.