Green Community

Who we are

Who we are

Carollo Engineers is an environmental engineering firm that specializes in the planning, design, and construction of water and wastewater facilities. The firm was founded in Phoenix, Arizona, in 1933 and counts the City of Phoenix among one of our original clients—a working relationship more than 80 years old! From that single office with three engineers, Carollo has grown to more than 800 people in 42 offices throughout the United States. Our staff includes civil, structural, electrical, mechanical, environmental, and instrumentation and control engineers, as well as scientists, planners, architects, and CAD designers.

Cities, utilities, and special districts of all sizes count on Carollo to help them navigate through the increasingly complex challenges of cost-effectively and sustainably protecting public health; meeting local, state, and federal regulatory requirements; protecting the water environment; and addressing public expectations. Our core philosophy for success is to work collaboratively with our clients to find the best ways to protect and enhance our public water supplies and our lakes, streams, rivers, and oceans.

We recognize that water sustains life on this planet and clean, safe water sustains healthy ecosystems and healthy communities. Our employees are proud of our role in making the communities that we live in, work in, and serve, better places to live. We continually strive to emulate our mission statement of being: "The BEST water consulting firm in the United States."