Key Takeaways Tetra Tech's GSG sales rose 15.1% on water infrastructure, disaster response and federal sector strength.CIG revenue grew 1% on U.K. and Ireland water programs and momentum in high-performance buildings.Acquisitions expanded digital automation, systems integration and European market presence for Tetra Tech.Tetra Tech, Inc. (TTEK) has been witnessing solid momentum across its segments. The company’s Government Services Group (GSG) segment is benefiting from a solid pipeline of advanced water i ...