Welcome to Carollo Engineers
Carollo Engineers has provided planning, design, and construction management services for municipal clients since our founding in 1933. We are the largest firm in the United States that is dedicated solely to water and wastewater treatment, that is all we do. We continually strive to emulate our mission statement, “Dedicated to creative, responsive, quality solutions to those we serve.”
Historically, Carollo has worked primarily in the Western United States. However, over the past decade, we have expanded the areas we service by hiring many of the brightest minds in the industry, forming an applied research group, and developing design approaches that optimize project delivery. Thanks to these efforts, we have completed many high profile projects on a national level.
Carollo is guided by a culture of teamwork and integrity. Embracing the firm’s rich history and solid reputation for offering professional excellence, our employees share a mission to provide quality engineering services, technological leadership, and successful business practices.
Carollo Engineers · 2700 Ygnacio Valley Road · Suite 300 · Walnut Creek, CA 94598Phone: 1.925.932.1710 · Fax: 925.930.1710 · 1.800.523.5826
Carollo Engineers is a registered trademark of Carollo Engineers, Inc.