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Tetra Tech, Inc. was founded in 1966 as the Water Management Group of Tetra Tech Inc., by Nicholas Boratynski, Henri Hodara, Bernard LeMéhauté, and Don Stern.
During its early years, the company designed waterway structures at harbors, ports, and marinas; supported water quality control projects; supported oil and gas exploration projects; and calculated the effects of offshore military activities for the Department of Defense. [ citation needed ]
In 1977, Tetra Tech offered common stock on the American Stock Exchange and used this capital to expand its services, from developing methods to predict the level and frequency of floods and causes of acid rain to environmental impact studies of gas pipeline construction and installing Hydro Products equipment for the United States Navy. By 1979, Tetra Tech was helping to analyze data used in exploring the Alaska North Slope for oil.
In 1982, Honeywell purchased Tetra Tech's U.S. operations and another group acquired Tetra Tech International. The company phased out gas exploration and related products and phased in data systems.
In 1988, Honeywell sold Tetra Tech's engineering division to a group of company employees. Dr. Li-San Hwang joined the company in 1967 and led the new independent Tetra Tech. Honeywell retained the data systems division and a Tetra Tech co-founder to head it. After its split from Honeywell, the company grew from 300 employees to more than 14,000 by December 2014.
In 1991, Tetra Tech issued 1.4 million shares of stock on the Nasdaq exchange. The cash infusion permitted more acquisitions of engineering firms specializing in water resources (urban drainage and flood control), civil engineering (bridges and waterway design), environmental restoration, and hazardous waste cleanup. Gross revenues totaled $96.5 million by 1994.
In 2005, Dr. Hwang retired, and Dan Batrack, who joined Tetra Tech in the early 1980s, became CEO.
In 2016, Tetra Tech commemorated its 50th anniversary. As part of the Company's anniversary it launched the Global Clean Water Fund grant program in partnership with Engineers Without Borders. Tetra Tech donated $50,000 to 6 projects around the world that provided clean, safe water for communities in need. Tetra Tech also celebrated 25 years as a publicly traded company on the Nasdaq exchange in December 2016.