Compaction Grouting Services, Inc. (CGS) is a geotechnical contracting firm specializing in compaction grouting, micropiles, soil nails and shotcrete, and sinkhole remediation. In February 2016, CGS achieved DBE status through the PA Unified Certification Program -- the only state certification program available. CGS is a Pennsylvania-based organization, whose directors have focused on ground modification since the 1980s. Our team, which includes professional engineers, boasts more than 35 years of combined geotechnical construction and engineering experience. This background enables us to provide value-engineered solutions by working with the project design professionals to develop the highest quality and most cost-effective alternatives.