Carollo Engineers

We are an environmental engineering firm specializing in the planning, design, and construction of water and wastewater facilities. Water is our sole focus. It’s our passion. It’s why we come to work every day. And why we stay up at night thinking about better ways to provide clean water resources for the health of our communities and our planet. We’ve grown to become the largest water-only consulting firm in the U.S. for a reason—our experience, expertise and passion, has served our clients well and has opened the door to the very best talent in the water industry.