David L. Sedlak is an American environmental engineer and Vice Chair for Graduate Studies and Professor of Environmental Engineering at University of California, Berkeley. Sedlak’s research focuses on the fate of chemical contaminants, with the long-term goal of developing cost-effective, safe, and sustainable systems to manage water resources. He is particularly interested in the development of local sources of water. Sedlak’s research has addressed water reuse--the practice of using municipal wastewater effluent to sustain aquatic ecosystems and augment drinking water supplies--as well as the treatment and use of urban runoff to contaminated groundwater from contaminated industrial sites as water supplies. 

Jonah Schein is National Program Manager for Homes & Buildings for the EPA's WaterSense Program. Jonah is an experienced water efficiency professional working on national and international water issues. Jonah has spent over a decade leading the technical direction and development of WaterSense, the EPA's water efficiency program. He holds a Master's degree in Environmental Science & Policy from The Johns Hopkins University.

Laureen holds Bachelor's and Master's degrees in architecture from the University of Illinois and is a licensed architect in Illinois & Wisconsin as well as having received approval for reciprocal licensure across the country via NCARB certification. She has also built a successful 30-year+ practice in the design and construction of commercial buildings, multi-family projects, single family homes, and interiors. Additional experience includes ratings, inspections, and certification application processing for a variety of commercial & residential properties through LEED BD+C, LEED ID+C, LEED for Homes & LEED for Homes Mid-Rise, Energy Star Homes & Energy Star Multifamily High Rise, Enterprise Green Communities, and the WERS (Water Efficiency Rating Score). Other accreditations & certifications include USGBC LEED® for Homes QAD, RESnet/HERS Energy Rater, LEED for Homes Green Rater, LEED AP BD+C, LEED AP HOMES, USGBC LEED® Faculty™, and WERS Faculty & Verifier.

Lindsay Rogers is Policy Advisor for Western Resource Advocates. By facilitating local and state-level policy development and providing direct project support, Lindsay helps communities and utilities pursue innovative and tailored water-saving strategies such as graywater ordinances, waterwise landscaping programs, and better integrated water and land-use planning. Prior to joining Western Resource Advocates in 2021, Lindsay spent five years as the Colorado Basin Program Manager at WaterNow Alliance, focused on advancing sustainable water policies and programs in the West by working directly with municipal water decision makers. Lindsay serves on the Board of Colorado WaterWise and as the Land & Water Chair on the City of Edgewater’s Sustainability Board.

Michelle Maddaus, P.E., is a registered civil engineer in California with 20 years of experience, a wide variety of which is in the water resources field. Michelle is comfortable designing both indoor and outdoor conservation programs with current technology. She has conducted over 300 CII audits and has directly witnessed equipment and program needs of the water customers, including the survey for facilities in California, Washington, Illinois, Arizona and Hawaii. Her water audit experience includes facilities in Arizona Grant Hotel, Biltmore Hotel in Arizona, University of California Santa Cruz, Stanford Linear Accelerator, and Stanford University Campus.

Paul D. Bishop, CAE, President & CEO of Water Professionals International (WPI), has led the organization since 2008. With a 30-year career spanning private enterprises, government, and the not-for-profit sector, Paul is a champion of environmental excellence and workforce development. His tenure at WPI is characterized by an unwavering commitment to quality and integrity in environmental certification programs. Under his guidance, WPI has introduced industry-leading standardized exams, established an independent commission to enhance program integrity, and pioneered all-encompassing, uniform standards for water operator certification.

Gary Klein, President of Gary Klein & Associates has been intimately involved in energy efficiency and renewable energy since 1974. One fifth of his career was spent in the Kingdom of Lesotho, the rest in the United States. Mr. Klein has a passion for hot water: getting into it, getting out of it, and efficiently delivering it to meet customers' needs. After serving 19 years with the California Energy Commission, he has provided consulting on sustainability since 2008.

Christoph Lohr is IAPMO’s Vice President of Technical Services and Research. As part of his duties he provides industry leadership through participation in strategic industry initiatives, and provide technical support to all IAPMO’s business units as needed. Christoph has over a decade of experience in designing plumbing systems and has a reputation as a results-oriented expert, particularly in the realm of balancing waterborne pathogen prevention and water sustainability. Through his concentrated focus and systems-based approach he has honed his personal and organization's strategy on possible breakthrough points. It is with this mindset that Christoph consistently looks to find long-term, holistic solutions that positively impact public health and safety of plumbing systems and improving strategy development. With this experience, Christoph shapes the industry by regularly sharing his thoughts via speaking engagements and writing. He is a distinguished graduate from the Virginia Military Institute, with a Bachelor of Science in Mechanical Engineering.

Darrell Lehman, President & CEO of Triconic LLC, is a pioneering figure in the Testing, Inspection, and Certification (TIC) industry. With over 37 years of experience, Lehman’s commitment to innovation and excellence is evident. His focus lies in creating efficient and user-friendly branded certification programs for clients. At Triconic, he leads efforts to modernize homebuilding validation systems, moving beyond traditional rule-based compliance. Lehman also advises TIC entities, stakeholders, and governments on strategic development and operational efficiencies. His educational background in Architectural Technology, Management, and Information Technology complements his vast professional experience, making him a visionary leader dedicated to sustainable, innovative practices in the homebuilding industry.

Darrin Polhemus is a Deputy Director for the California State Water Resources Control Board, where he is in charge of the Division of Drinking Water. The Division of Drinking Water administers the federal and California Safe Drinking Water Acts, which regulate over 7,400 public water systems throughout the State to ensure the delivery of safe drinking water to all Californians. The Division also permits recycled water usage, manages the Environmental Laboratory Accreditation Program, oversees the work of county health departments that have been delegated the authority to regulate small water systems, and develops regulations pertaining to drinking water. Darrin is a licensed civil engineer and holds a B.S. in Agricultural Engineering from California Polytechnic State University, San Luis Obispo.

Sarah Sojka is an Associate Professor of Physics and Environmental Studies at Randolph College. She earned her M.S. and PhD in Environmental Sciences at the University of Virginia. She began work on rainwater harvesting systems in 2008, working at Rainwater Management Solutions (RMS). In 2012, she left RMS to work at Randolph College where she continues to do research on rainwater harvesting systems. She is a past member of the ARCSA Foundation Board of Directors.

Mike Collignon is the Executive Director of the Green Builder® Coalition, an organization he co-founded in 2010. He engages in national and state-level advocacy and publishes regular content for Green Builder® Media. Mike is the Chair of the WERS Development Group and the Co-Chair of the Next Generation Water Summit. Finally, he is the Program Manager for Housing 2.0 and has served as the moderator or host for Green Builder® Media’s webinars from 2012–present.

Jonah Schein is National Program Manager for Homes & Buildings for the EPA's WaterSense Program. Jonah is an experienced water efficiency professional working on national and international water issues. Jonah has sepnt over a decade leading the technical direction and development of WaterSense, the EPA's water efficiency program. He holds a Master's degree in Environmental Science & Policy from The Johns Hopkins University.

Christoph Lohr is IAPMO’s Vice President of Technical Services and Research. As part of his duties he provides industry leadership through participation in strategic industry initiatives, and provide technical support to all IAPMO’s business units as needed. Christoph has over a decade of experience in designing plumbing systems and has a reputation as a results-oriented expert, particularly in the realm of balancing waterborne pathogen prevention and water sustainability. Through his concentrated focus and systems-based approach he has honed his personal and organization's strategy on possible breakthrough points. It is with this mindset that Christoph consistently looks to find long-term, holistic solutions that positively impact public health and safety of plumbing systems and improving strategy development. With this experience, Christoph shapes the industry by regularly sharing his thoughts via speaking engagements and writing. He is a distinguished graduate from the Virginia Military Institute, with a Bachelor of Science in Mechanical Engineering.

Victoria Edwards is founder and CEO of FIDO, a pioneering tech company whose quantifiable AI is revolutionizing the management of water networks in the face of climate change-induced scarcity. A passionate believer in collaboration, she plays a pivotal role in a growing number of new unconventional partnerships which link utilities with forward-thinking corporations and other non-traditional stakeholders in stressed river basins around the shared goal of water replenishment. Victoria is a charismatic thought leader and passionate speaker on the power of disruptive technologies to drive positive social, climate and economic outcomes. She also co-chairs the Indian digital working group, set up by the UK Department for Business and Trade.

Adam DeHeer is the co-founder & CEO of LeapFrog Design, a trailblazing force in the world of innovative onsite water reuse solutions. With a passion for merging creativity, ecology, and technology, Adam is an award-winning designer transforming big ideas into delightful green infrastructure solutions for water security. Adam's extensive background in design and business has fueled LeapFrog's growth, marked by a commitment to pushing boundaries, fostering a culture of collaboration, and staying ahead of industry trends. Under his guidance, the company continues to redefine the possibilities of green infrastructure, leaving an indelible mark on the water reuse industry with a nature-based approach.

Adam DeHeer is the co-founder & CEO of LeapFrog Design, a trailblazing force in the world of innovative onsite water reuse solutions. With a passion for merging creativity, ecology, and technology, Adam is an award-winning designer transforming big ideas into delightful green infrastructure solutions for water security. Adam's extensive background in design and business has fueled LeapFrog's growth, marked by a commitment to pushing boundaries, fostering a culture of collaboration, and staying ahead of industry trends. Under his guidance, the company continues to redefine the possibilities of green infrastructure, leaving an indelible mark on the water reuse industry with a nature-based approach.

Christine Y. Chavez has a background in water rights administration and energy & water conservation program management in the state of New Mexico. Christine is the Water Conservation Manager for the City of Santa Fe and is a certified Energy Auditor with the Building Performance Institute, Certified Landscape Irrigation Auditor with the Irrigation Association and Qualified Water Efficient Landscaper through EPA WaterSense. She is the recipient of AWE's 2023 Water Star award. She is a graduate of New Mexico State University (B.S. in Environmental Science and M.S. in Biology).