Tetra Tech Selected for Missile Defense Agency SHIELD Multiple-Award IDIQ

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Key Terms

indefinite-delivery/indefinite-quantity (idiq) regulatory

An indefinite-delivery/indefinite-quantity (IDIQ) contract is a purchasing agreement where a buyer commits to order goods or services over a set period but does not promise exact quantities up front, instead placing individual orders as needs arise within agreed limits. For investors, IDIQs matter because they can create steady, multi-year revenue opportunities and backlog visibility like a supplier having a standing store account — but actual cash depends on each future order and on the buyer’s budget and timing.

multiple-award technical

A multiple-award arrangement is when a buyer awards the same work or supply opportunity to more than one vendor, creating several approved suppliers who can all receive orders under the same program. For investors, this matters because revenue and future business from that program will be split and competed for among multiple providers, making cash flow, margins and market share less certain—think of several stores sharing the same delivery area rather than one exclusive seller.

01/08/2026 - 09:00 AM

PASADENA, Calif.--(BUSINESS WIRE)-- Tetra Tech, Inc. (NASDAQ: TTEK), a leading provider of high-end consulting and engineering services in water, environment, and sustainable infrastructure, announced today that Tetra Tech was awarded a contract for the Missile Defense Agency Scalable Homeland Innovative Enterprise Layered Defense (SHIELD) indefinite-delivery/indefinite-quantity (IDIQ) contract with a ceiling of $151 billion. This contract encompasses a broad range of work areas that allows for the rapid delivery of innovative capabilities to the warfighter with increased speed and agility.

About Tetra Tech

Tetra Tech is the leader in water, environment and sustainable infrastructure, providing high-end consulting and engineering services for projects worldwide. With more than 25,000 employees working together, Tetra Tech provides clear solutions to complex problems by Leading with Science^® to address the entire water cycle, protect and restore the environment, and design sustainable and resilient infrastructure. For more information about Tetra Tech, please visit tetratech.com or follow us on LinkedIn and Facebook.

Any statements made in this release that are not based on historical fact are forward-looking statements. Any forward-looking statements made in this release represent management’s best judgment as to what may occur in the future. However, Tetra Tech’s actual outcome and results are not guaranteed and are subject to certain risks, uncertainties and assumptions ("Future Factors"), and may differ materially from what is expressed. For a description of Future Factors that could cause actual results to differ materially from such forward-looking statements, see the discussion under the section "Risk Factors" included in the Company’s Form 10-K and Form 10-Q filings with the Securities and Exchange Commission.