Company · Engineering & Consulting Services

Tetra Tech, Inc

Federal civil lawsuits naming Tetra Tech, Inc, a Engineering & Consulting Services company.

Public CompanyEngineering & Consulting Services

Ticker: Nasdaq: TTEK
Business: Services-Engineering Services
Headquarters: Pasadena, CA
Incorporated in: Delaware
SEC CIK: 831641

Tetra Tech, Inc is a public company in Services-Engineering Services, based in Pasadena, CA (traded on Nasdaq as TTEK, incorporated in Delaware). It appears in 110 federal civil lawsuits in this index, most often as a defendant (94 of 110). These cases are most often Contract and Real Property matters, filed between 1994 and 2024, most frequently in District Court, N.D. California. The most common causes of action are Employment, Breach of Contract, and Employment Discrimination. Frequent opposing parties include Walker, The United States of America, and Liberty Mutual Insurance Company.

110

Lawsuits

As Defendant

As Plaintiff

Open

107

Terminated

1994–2024

Span

9 mo

Median Duration

3.5 cases/yrNamed as defendant in 85% of cases40% ContractRecent filings down

Cases by State

AK · 1

Open Cases Over Time

1994peak 9 open2024

Case Types Over Time

19942024

ContractReal PropertyCivil RightsLaborFederal Tax / Statutory Actions

Filings by Year

19942024

Case Types filter →

Federal Tax / Statutory Actions6

Personal Property / Fraud5

Where Filed filter →

Frequent Opposing Parties

Filtered Contract Clear

44 Cases — Newest First

Burrell Diversified Investments, LLC v. Tetra Tech, Inc

Contract Terminated District Court, D. New MexicoNo. 1:18-cv-00062Filed 01/19/2018
The United States of America for the Use of A.C. Dellovade, Inc v. Tetra Tech Tesoro, Inc

Contract Terminated District Court, E.D. VirginiaNo. 1:17-cv-00338Filed 03/23/2017
Jaaat Technical Services, LLC v. Tetra Tech Ec, Inc

Contract Terminated District Court, E.D. VirginiaNo. 3:16-cv-00998Filed 12/22/2016
Callaway Marine Technologies, Inc v. Tetra Tech, Inc

Contract Terminated District Court, S.D. FloridaNo. 1:16-cv-20855Filed 03/09/2016
Tetra Tech Tesoro Inc v. Safeco Insurance Company of Am

Contract Terminated District Court, M.D. GeorgiaFiled 12/08/2015
United States of America, For the Use of Clark Security Products, Inc v. Tetra Tech Tesoro, Inc

Contract Terminated District Court, E.D. VirginiaNo. 2:15-cv-00496Filed 11/13/2015
Liberty Mutual Insurance Company v. Tetra Tech, Inc

Contract Terminated District Court, C.D. CaliforniaNo. 2:15-cv-03386Filed 05/06/2015
Jaaat Technical Services, LLC v. Tetra Tech Tesoro, Inc

Contract Terminated District Court, E.D. VirginiaNo. 3:15-cv-00235Filed 04/17/2015
Tetra Tech, Inc v. Liberty Mutual Insurance Company

Contract Terminated District Court, N.D. GeorgiaNo. 1:15-cv-00169Filed 01/20/2015
Harold E. Nutter and Son Inc v. Tetra Tech Tesoro Inc

Contract Terminated District Court, E.D. VirginiaNo. 2:14-cv-00386Filed 07/30/2014
Tetra Tech Construction Inc v. Summit Natural Gas of Maine Inc

Contract Terminated District Court, D. MaineNo. 1:14-cv-00298Filed 07/17/2014
Mk Salvage Venture LLC v. Tetra Tech Ec, Inc

Contract Terminated District Court, W.D. WashingtonNo. 2:13-cv-00085Filed 01/14/2013
Antill Pipeline Construction Company, Inc v. Tetra Tech Ec, Inc

Contract Terminated District Court, E.D. LouisianaNo. 2:12-cv-01943Filed 07/27/2012
River Front Recycling and Aggregate, LLC v. Tetra Tech Construction, Inc

Contract Terminated District Court, D. New JerseyNo. 1:12-cv-04134Filed 07/05/2012
Tetra Tech Construction, Inc v. Hamon Contractors, Inc

Contract Terminated District Court, D. ColoradoNo. 1:12-cv-01671Filed 06/26/2012
Gmc Contracting, Inc v. Tetra Tech Construction Inc

Contract Terminated District Court, D. AlaskaNo. 3:12-cv-00092Filed 04/30/2012
The United States of America v. Tetra Tech, Inc

Contract Terminated District Court, S.D. GeorgiaNo. 1:12-cv-00062Filed 04/24/2012
Tetra Tech, Inc v. Poche

Contract Terminated District Court, E.D. LouisianaNo. 2:11-cv-01541Filed 06/30/2011
Harbor Point Cinema, L.L.C v. Tetra Tech, Inc

Contract Terminated District Court, N.D. OklahomaNo. 4:10-cv-00452Filed 07/15/2010
Dollar Concrete Construction Company v. Tetra Tech Facilities Construction, LLC

Contract Terminated District Court, N.D. GeorgiaNo. 1:10-cv-01059Filed 04/09/2010
Program Management International v. Tetra Tech Ec, Inc

Contract Terminated District Court, W.D. TexasNo. 5:09-cv-00877Filed 10/28/2009
Tetra Tech Ec, Inc v. Ahtna Government Services Corporation

Contract Terminated District Court, C.D. CaliforniaNo. 2:09-cv-04278Filed 06/15/2009
Tetra Tech Ec, Inc v. Jerry Herling Construction, Inc., a California Corporation, and Jerry Herling an Individual

Contract Terminated District Court, D. WyomingNo. 2:08-cv-00210Filed 09/25/2008
Sullivan v. Tetra Tech, Inc

Contract Terminated District Court, S.D. CaliforniaNo. 3:08-cv-01433Filed 08/07/2008
A.G. Powell Equipment Corporation v. Tetra Tech Consulting & Remediation, Inc

Contract Terminated District Court, W.D. PennsylvaniaNo. 2:07-cv-00184Filed 02/15/2007
Castleberry McGregor Swinford LLC, Architects v. Tetra-Tech, Inc

Contract Terminated District Court, W.D. KentuckyNo. 5:07-cv-00013Filed 01/25/2007
Tetra Tech Consulting & Remediation v. Central Industrial Construction

Contract Terminated District Court, D. UtahNo. 2:06-cv-00502Filed 06/22/2006
Steel Equipment Corporation v. Tetra Tech Cr, Inc

Contract Terminated District Court, W.D. PennsylvaniaNo. 2:06-cv-00719Filed 06/02/2006
Bechtel-S Corporation v. Tetra Tech, Inc

Contract Terminated District Court, W.D. TexasNo. 1:06-cv-00367Filed 05/12/2006
Dielco Crane Service v. Tetra Tech Consulting & Remediation

Contract Terminated District Court, D. UtahNo. 2:06-cv-00269Filed 04/03/2006
Tetra Tech Consulting & Remedi v. Qingdao Iron & Steel Group Co

Contract Terminated District Court, S.D. TexasFiled 12/12/2005
Tetra Tech Consulting and Reme v. Qingdao Iron and Steel Group H

Contract Terminated District Court, S.D. OhioFiled 09/07/2005
Richard v. Tetra Applied Tech

Contract Terminated District Court, S.D. TexasNo. 3:04-cv-00036Filed 01/22/2004
Great Lakes Construction Co v. Tetra Tech Cr, Inc

Contract Terminated District Court, N.D. OhioNo. 1:03-cv-02292Filed 11/10/2003
Tetra Tech Fw Inc v. Ketchikan Pulp Company

Contract Terminated District Court, D. OregonNo. 3:03-cv-00592Filed 05/06/2003
Gunnell v. Tetra Applied Tech

Contract Terminated District Court, S.D. TexasNo. 3:03-cv-00180Filed 03/14/2003
Edwards v. Tetra Applied Tech

Contract Terminated District Court, S.D. TexasNo. 3:03-cv-00039Filed 01/23/2003
C-P Integrated Svc v. Tetra Tech Inc

Contract Terminated District Court, W.D. OklahomaNo. 5:02-cv-01693Filed 12/02/2002
Axa-Re Prop & Cas v. Tetra Tech Inc

Contract Terminated District Court, E.D. LouisianaNo. 2:02-cv-01968Filed 06/25/2002
Stovall v. Tetra Applied Tech

Contract Terminated District Court, S.D. TexasNo. 3:01-cv-00601Filed 10/03/2001
Holmes v. Tetra Applied Tech

Contract Terminated District Court, S.D. TexasNo. 3:00-cv-00294Filed 05/23/2000
Horsehead Industries v. Tetra Tech, Inc

Contract Terminated District Court, N.D. OklahomaNo. 4:00-cv-00044Filed 01/18/2000
Murphy v. Tetra Tech, Em, Inc

Contract Terminated District Court, E.D. VirginiaNo. 1:99-cv-00313Filed 03/10/1999
Oryx Energy Co v. Tetra Tech Inc

Contract Terminated District Court, W.D. LouisianaNo. 6:94-cv-01572Filed 08/22/1994