PASADENA, Calif. — (BUSINESS WIRE) — April 27, 2022 — Tetra Tech, Inc. (NASDAQ: TTEK), a leading provider of high-end consulting and engineering services, today announced that it was awarded U.S. Patent Number 11,269,957 for its proprietary Volans™ 3D animation and visualization software. Volans™ saves the aviation industry significant time and money in meeting their sustainability goals of building a net zero sustainable aviation system.

Volans™ is used extensively for environmental analysis and visualization by the Federal Aviation Administration (FAA) and air navigation organizations in Canada, Australia, South America, and Europe; and local airport authorities.

The patented software provides a platform to efficiently assess environmental impacts of air traffic activity with unprecedented speed and simplicity. Volans™ unique method of performing noise and carbon emissions analysis in conjunction with the FAA’s Aviation Environmental Design Tool (AEDT) is applicable worldwide.

The creation of Volans™ is attributed to Tetra Tech software engineers Mark Karmelich, Paul Dunholter, Paul Ziegler, and Robert Milton. Co-author Mark Karmelich said, “Our customers were spending days at a time running environmental modeling for large airport studies. We invented a way to cut down this time by a factor of 10, something no one else was doing.”

“The Tetra Tech Federal Information Technology Group has been providing lifecycle services to support the FAA and other aviation authorities in their mission to deliver safe and sustainable aviation systems for more than 20 years,” said Tetra Tech Chairman and CEO Dan Batrack. “We use our Leading with Science^® approach and Tetra Tech Delta technologies, such as Volans™, to help our clients solve some of their most important challenges. Patenting our work protects the value of Tetra Tech's intellectual property, enabling us to continue to enhance these innovative technologies for our clients.”

About Tetra Tech

Tetra Tech is a leading provider of high-end consulting and engineering services for projects worldwide. With 21,000 associates working together, Tetra Tech provides clear solutions to complex problems in water, environment, sustainable infrastructure, renewable energy, and international development. We are Leading with Science^® to provide sustainable and resilient solutions for our clients. For more information about Tetra Tech, please visit tetratech.com or follow us on LinkedIn, Twitter, 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.

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