Headquartered in Indiana with a Liberty Station office at Historic Decatur Road in Point Loma, GEOTILL operates as a PE-registered engineering consultancy certified by the Indiana Department of Transportation and prequalified by the Public Works Certification Board. The San Diego branch runs subsurface exploration and ASTM-standard soil-testing programs that complement the structural-foundation work of engineers like David D. Smith Engineer A.P.C. on coastal and hillside sites. Drill rigs deploy for Standard Penetration Tests and Shelby-tube sampling to define bearing capacity, liquefaction risk, and settlement parameters under California's Seismic Design Category D and E requirements. Asbestos-survey and Phase I/II environmental-assessment services address DTSC and Regional Water Quality Control Board compliance for commercial redevelopment parcels. Construction materials-testing for concrete, aggregate, and compacted fill keeps general contractors like Complete Builders Inc within project specifications during grading and foundation pours. The firm's deepest-scope engagements combine geotechnical evaluation, environmental remediation oversight, and full construction-phase observation on multi-story commercial builds requiring drilled-pier or soil-nail retention systems.