55 : Tetra Tech Inc.

Top 100 Revenue:	$384,057,000	Current Revenue Rank Historical Revenue
Defense revenue:	$63,013,000
Civilian revenue:	$321,044,000
2012 revenue:	$2.7 billion
2012 earnings :	$104,380
2011 revenue:	$2.6 billion
2011 earnings:	$90,039
Number of employees:	14,000
Headquarters:	Pasadena, Calif.
Web address:	http://www.tetratech.com
President/CEO:	Dan L. Batrack, Chairman, President and CEO
Ticker:	TTEK
Lines of business:	Water, Environment, Energy, Infrastructure, Natural Resources
Major contracts/projects:	Alliant GWAC, MOBIS, LOGWORLD, FABS

Sources: Washington Technology, Federal Procurement Data System and Houlihan Lokey

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