Tetra Tech was founded in 1966 to provide engineering services related to waterways, harbors, and coastal areas. For 60 years, we have substantially increased the size and scope of our business and expanded our service offerings through a series of strategic acquisitions and internal growth. Today we are organized into two major business groups that align with our core markets and enhance the development of high-end consulting and technical solutions to meet our growing client demand. With more than 25,000 employees working together across 500 offices worldwide, we combine local understanding with the resources and expertise for the most demanding projects. We are differentiated by Leading with Science® to provide innovative technical solutions to our clients. We support global commercial and government clients focused on water, environment, and sustainable infrastructure. Our network spans every major region of the world, offering the agility and experience of a local business backed by the capabilities of a multibillion-dollar global company.

We are built on a culture of innovation and committed to creating positive, impactful change as we address the world's most complex problems. We are proud to be home to industry-leading scientists, engineers, and technical specialists and to use this expertise throughout the project life cycle. Our strength is in collectively providing integrated services—delivering the best solutions to meet our clients' needs. We are a diverse group of consultants, technical specialists, and support teams at the forefront of our professions. Individually, we are creative, dedicated experts; collaboratively, we deliver reliable, integrated solutions for our clients.

We provide clear solutions for projects in water, environment, and sustainable infrastructure. Our world-class engineers and scientists leverage industry-leading technical expertise, in-depth local knowledge, and sustainable approaches to provide resilient solutions for our clients. From innovative water systems to reliable energy and digital tools, our solutions solve today's most dynamic challenges. We combine operational expertise, science, and technology through our Tetra Tech Delta suite of advanced data analytics, artificial intelligence, and digital technologies that provide transformational solutions for our clients.

Our vision is to be the premier global consulting and engineering firm, focusing on water, environment, and sustainable infrastructure. Our mission is to improve the quality of life for people around the world through science, technology, and innovation. We are Leading with Science® to address the entire water cycle, protect and restore the environment, reduce carbon emissions, increase renewable energy generation, and design sustainable infrastructure that works for both people and the planet.

We put our clients first. We listen better to understand our clients' needs and deliver smart, cost-effective solutions that meet those needs. We take on our clients' problems as if they were our own. We develop and implement real-world solutions that are cost-effective, efficient, and practical. We listen to one another and foster open and honest communication. We value the opinions of employees and respect their diverse backgrounds. We encourage communication among employees and solicit ideas and suggestions about the company. Employee initiative is the primary driver of career development.

We are differentiated by Leading with Science® to provide innovative technical solutions to our clients. With 60 years of research and industry-leading, technology-driven experience, we combine deep domain expertise with our suite of Tetra Tech Delta technologies to provide integrated solutions. Our interdisciplinary experts understand the challenges our clients face and how to leverage technology to solve them. We have one of the lowest employee turnover rates in our industry, and we've been ranked #1 in Water Treatment/Desalination, #1 in Environmental Management, and #1 in the top 27 U.S. Environmental and Sustainability consultancies. We perform more than 100,000 projects each year for clients worldwide.

We formalized our Sustainability Program in 2010 and report annually on our progress towards achieving our 2030 ESG goals. We were ranked #1 for Human Capital and #2 for Environment in the Investor's Business Daily 2023 Best ESG Companies special report. Our most significant impact as a company is through the 100,000 projects that we perform on behalf of our clients each year. We measure the social and environmental impacts of these projects as a part of our goal to improve the lives of 1 billion people globally by 2030. We continue to enhance the sustainability of our daily practices, reduce our greenhouse gas emissions, and provide an exceptional working environment for our employees across our global operations. We are committed to the United Nations Global Compact and Science Based Targets Initiative.

Our employees lead our giving and volunteering efforts to preserve, strengthen, and support their local communities—from supporting food kitchens and holiday donation drives to river clean-ups and youth activities. We recognize those efforts in our annual Excellence & Achievement Award for Community Service, presented to those employees who have excelled in supporting their communities and people in need. We partner annually with a charity or global organization to support communities in need around the world. In 2022 we partnered with Engineers Without Borders USA to bring safe and clean water to families in Eastern Uganda. Our award-winning Science, Technology, Engineering, and Mathematics (STEM) Program aims to promote and increase engagement in STEM subjects. In 2022 our employees donated more than $492,000 to community programs around the world.

We are committed to equal opportunity employment and to creating, managing, and valuing diversity in our workforce. No employee or applicant for employment will be discriminated against because of age, race, religion, ancestry, sex, national origin, disability, veteran status, sexual orientation, or genetics. Our Diversity & Inclusion Policy recognizes the contributions of our multinational, multicultural, and highly collaborative workforce of thousands of employees working from hundreds of offices around the world. This policy guides the Board of Directors, management, employees, subcontractors, and partners in developing an inclusive culture. We reached a gender equality milestone in 2019 with at least 30 percent female board representation, exceeding the national average. We embrace an inclusive culture, where each member of our global employee community can thrive.