Tetra Tech is a global provider of consulting and engineering services that focuses on water, environment, sustainable infrastructure, renewable energy and international development. Co. is a global company that is Leading with Science® to provide solutions for its public and private clients. Co. manages its operations under two reportable segments: Government Services Group, which provides consulting and engineering services to U.S. government clients and development agencies worldwide; and Commercial/International Services Group, which provides consulting and engineering services to U.S. commercial clients, and international clients inclusive of the commercial and government sectors.