Our Team Our team is the driving force behind our success. We are passionate realists and innovative creators at heart.

Dr. Markus Lenger is a distinguished water physicist, as well as the CEO and co-founder of CleanBlu, which is a prominent innovator in the wastewater and water reuse industry. He has over 35 years of experience in wastewater and is renowned for his ability to push the limits of science and technology in order to create innovative solutions that enhance water quality and accessibility. As both a physicist and an electrical engineer, Markus has developed patented water and biological monitoring systems that have served as the technical foundation for BluSENSE. His extensive experience in research and development, as well as his expertise in the manufacturing of measurement and treatment systems for water reuse, has led to his involvement in international standards and committees. Markus is the chair of the WE•Stand Residential Direct Potable Water Reuse Committee, which is responsible for establishing the technical and legal framework that allows for direct potable reuse in homes. He is also a Board Member of ARCSA, The American Rainwater Catchment Systems Association, a voting member of the ISO Sustainable Non-sewered Sanitation Systems, and a voting member of ISO Water Reuse in Urban Areas. Markus holds a BS in Electronic Engineering, a MS in Laser Technology, and a Doctorate in High Energy Physics. In addition to his work in the water industry, Markus is also an avid sailor and hiker, and enjoys exploring the beautiful coastal regions of the Southwest with his wife in his leisure time.

Gary Klein, President of Gary Klein & Associates, Inc. has been intimately involved in energy efficiency and renewable energy since 1974. One sixth of his career was spent in the Kingdom of Lesotho, the rest in the United States. Since the early 1990s he has led the effort to incorporate “hot water as a system” into the core principles of building science. After serving 19 years with the California Energy Commission, he has provided consulting on sustainability since 2008, with an emphasis on the water-energy-carbon-health connection. The benefits of right-sizing premise plumbing and water heating systems are currently at the top of his list. Klein received a BA from Cornell University in 1975 with an Independent Major in Technology and Society with an emphasis on energy conservation and renewable energy. The International Association of Plumber and Mechanical Officials (IAPMO) recognized his efforts in 2014 presenting him their Green Professional of the Year award. In 2015 the Department of Energy awarded him the Jeffrey A. Johnson Award for Excellence in in the Advancement of Building Energy Codes.