Pasadena, California-based consulting and engineering company Tetra Tech Inc. (NASDAQ: TTEK) is buying Vienna-based data analytics company Indus Corp., adding a deeper IT element to its portfolio of water management and treatment services. Indus will operate as a company of Tetra Tech and its more than 150 employees will remain headquartered in Vienna. Indus CEO Shiv Krishnan will remain head of the company. Financial terms of the deal were not disclosed. Indus will be folded into Tetra Tech's...