Water/Wastewater Intern (Summer 2026)

At HDR, our employee-owners are fully engaged in creating a welcoming environment where each of us is valued and respected, a place where everyone is empowered to bring their authentic selves and novel ideas to work every day. As we foster a culture of inclusion throughout our company and within our communities, we constantly ask ourselves: What is our impact on the world? Watch Our Story:' Each and every role throughout our organization makes a difference in our ability to change the world for the better. Read further to learn how you could help make great things possible not only in your community, but around the world. HDR is looking for a summer 2026 Water/Wastewater Intern candidate to join our Water Business Group in Walnut Creek, CA. We believe water is more than a resource, it's a shared responsibility. As part of our Water Business Group, you'll help shape how communities manage water for generations to come. From delivering safe drinking water and treating wastewater responsibly to developing sustainable water supplies and protecting lives and property through flood control, your work will directly support public health, environmental sustainability, and infrastructure resilience. We bring together experts across disciplines to solve complex challenges with bold thinking and technical excellence. Whether you're modernizing aging systems or pioneering innovative approaches, your contributions will make a meaningful difference in people's lives. This isn't just a job, it's a chance to lead change, drive progress, and leave a lasting legacy. In the role of Water/Wastewater Intern, we'll count on you to: * Gain real-world experience on exciting projects * Conduct Computational Fluid Dynamics (CFD) modeling to help analyze the fluid dynamics in wastewater treatment processes * Support the collection of and sampling of wastewater in a research environment, which may require travel to Southern California to support the field work * Perform statistical analysis on the data collected from wastewater sampling * Connect with recent college graduates and our company leaders through mentoring and young professionals' programs * Apply standard engineering techniques and procedures * Perform assignments under the direct supervision of a professional or Project Manager * Perform other duties as needed Preferred Qualifications * Prefer 2 years completed toward degree with 3.0 GPA * Demonstrated knowledge of software packages related to field of study/industry * Have taken courses and have a demonstrated knowledge of Computational Fluid Dynamics (CFD) modeling, experience in wastewater CFD modeling a plus * Have taken courses and have a demonstrated knowledge in Statistical Analysis * Experience in the collection and sampling of wastewater in a research environment. * Valid CA Driver's license to drive * Ability to travel to Southern California * Local candidates preferred Required Qualifications * Currently enrolled in an undergraduate or graduate Engineering program * Attention to detail * Possess strong problem-solving and communication skills * Basic Microsoft Office skills * An attitude and commitment to being an active participant of our employee-owned culture is a must What We Believe HDR is our company. Together, we build on each other's life experiences and perspectives to make great things possible every day. This shapes our collaborative culture, encourages organizational trust and connects us closer to the clients and communities we serve. Our Commitment As employee owners, we all have a role in creating an inclusive environment where each of us is welcomed, valued, respected and empowered to bring our authentic selves to work every day. Our eight Employee Network Groups (Asian Pacific, Black, Hispanic/Latino(a), LGBTQ , People with Disabilities, Veterans, Women, Young Professionals) help create a sense of belonging and foster a supportive environment where everyone is empowered to engage and contribute. Each group has an executive sponsor and is open to all employees.

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