Tetra Tech, Inc. is a provider of consulting, engineering and technical services in the areas of water resource management and civil infrastructure. As a consultant, it assists clients in defining problems and developing and solutions. These services span the lifecycle of a project and include research and development, applied science and technology, engineering design, program management, construction, construction management, and operations and maintenance. It operates in three segments: resource management, infrastructure and communications. The Company provides consulting, engineering and technical services that assist clients in identifying industry-specific problems, defining appropriate solutions and implementing those solutions. In January 2007, the Company acquired Soil Testing Engineers (STE) of Louisiana. STE provides site investigation, geologic evaluation and geotechnical engineering design. In April 2007, the Company acquired The Delaney Group.