Amy Childress
It was 2 or 3 in the morning in a hotel in Hanoi, Vietnam. Amy Childress was on sabbatical, supposed to be asleep, but there she was, awake in the dark, submitting a research proposal sitting on the couch quietly so she wouldn’t wake her husband. While waiting for approvals to submit the proposal, she opened her email.
“Welcome to the National Academy of Engineering.”
She read it again. Did this just happen? Just like this? The quiet moment gave her time to process alone, to just sit with it and be excited. The NAE had recognized her “for advances in membrane technologies in desalination and wastewater reuse.” Decades of work distilled into a single sentence.
Childress is Dean’s Professor of Civil and Environmental Engineering at USC Viterbi School of Engineering‘s Sonny Astani Department of Civil and Environmental Engineering, where she also serves as founder and director of the ReWater Center and academic lead of the Water Reuse Consortium. The recognition represents a career spent advancing science with direct application to today’s most urgent real-world challenges.
How did she get here? She studied civil engineering at the University of Maryland because environmental engineering attracted her. When she looked at grad schools, a professor told her: if you want to study environmental, go to California. So she went to UCLA in the early ’90s.
Her advisor studied membranes. The school offered her a fellowship. She said yes. It was the right fit. That fellowship became a career, and that career became a calling.
Paper That Cleans Water
Her foundation has always been membranes. Think of them as specialized pieces of paper that filter pollutants out of water at molecular scales. She innovated new systems for water treatment, developing methods to understand and improve how membranes perform under real-world conditions.
From her PhD dissertation to now, she’s worked on characterizing membrane materials themselves. Understanding their surface properties, how they perform over time, how aging affects performance. This fundamental work has implications for every water treatment facility using membranes. If membranes last longer, facilities save money and reduce waste. If they perform more efficiently, more communities can access clean water.
After earning her PhD, she took a position at the University of Nevada, Reno, thinking she’d stay briefly. But she liked it there. Had children. Still, California kept pulling. Southern California was becoming the epicenter of water reuse. Not just out of need, but because of innovation. The means to try things. When the offer came to join USC, she took it.
Soon after arriving at USC, she saw an opportunity. Municipalities were planning water reuse projects. Consultants and agencies were busy with the work. But there was a gap. Two gaps, actually. Research still needed to be done. And the different players weren’t connecting. Weren’t communicating. They were working in parallel but not together. She decided to lead the effort to close the gaps.
Speaking Different Languages
Building bridges between groups became as central to her work as time in the lab. Leading this effort meant being a translator. Academia to industry, research to implementation, science to policy. “I’m interested in bridging academia, industry and government,” she explains. “They speak different languages. Researchers need years to develop findings. Utilities need solutions now. They’re working with different objectives and on different timelines.”
She serves on independent expert panels for projects across California and beyond: Santa Barbara, Los Angeles, Orange County, San Diego. For six years, she served on Singapore’s Public Utilities Board external advisory panel. These agencies, their communities, and regulators benefit from her technical eye and her ability to explain complex systems clearly.
She publishes the Potable Water Reuse Report with Trussell Technologies, connecting practitioners, regulators, and academics worldwide. She works with an Emmy-winning director to create visual media that bridges science and society, helping the public understand and trust water reuse projects.
Resetting Boundaries at 2 AM
All of this adds up. Researcher. Director. Advisor. Panel chair. Journal editor. Past president of the Association of Environmental Engineering and Science Professors. Fulbright Scholar. Clarke Prize Laureate. The list goes on.
This one-semester sabbatical (her first without children in school) was meant to create boundaries she’d let slip. But even now, in the Philippines, work follows her. On a recent walk to see a waterfall, she learned it was also the local water supply. Above-ground pipes ran everywhere. The tour guide’s child stopped and drank straight from one of them, demonstrating the water’s quality. Even on vacation, she can’t help but see water systems everywhere, evaluating access, quality, and infrastructure. The work follows her because it’s intrinsic to her observation and intent, how she views the world.
Building a Field
The ReWater Center she founded brings together researchers, industry, and government partners to tackle water reuse challenges. The Water Reuse Consortium, where she serves as academic lead, creates pathways for research to reach implementation. These aren’t just organizational roles. They’re infrastructure she built to close those gaps she identified.
The NAE honor brings responsibility, she knows. “Scientific leadership, mentoring, things which I’ve always considered very important, become even more ,” she says. She is concerned not just with advancing science, but ensuring the next generation can build on it. Making sure the connections between research and practice stay strong. Making sure the infrastructure she built continues to serve the field.
Ten years from now, success would look like more advanced water systems that operate with less energy and recover more resources. Success would be water reuse being normalized. Not a novelty, but standard practice. Communities trusting the advanced technology because the science is sound and the communication is clear. Those gaps she identified years ago? Filled with the kind of collaboration that makes innovation possible. That’s the career she’s built. That’s the impact she’s working toward.
Published on February 10th, 2026
Last updated on February 18th, 2026