A recognized expert in wastewater treatment, especially the use of biological processes, Dr. Daigger is currently a Senior Vice President and Chief Technology Officer for CH2M HILL where he has been employed for 32 years. He also served as Professor and Chair of the Environmental Systems Engineering Department at Clemson University. As the author or co-author of more than 100 technical papers, four books, and several technical manuals, he has contributed to advancing practice within our profession. He currently serves as President of the International Water Association (IWA). For the Water Environment Federation (WEF) he has served as Chair of several committees, including the task force that developed the most recent edition of the WEF MOP No. 8, Design of Municipal Wastewater Treatment Plants, Board of Editorial Review of Water Environment Research, the Technical Practice Committee, and the Committee Leadership Council (CLC). He has also served as in the House of Delegates and the Board of Trustees. For the Water Environment Research Foundation (WERF) he served on the Board of Directors and Research Council where he served as its chair. He is the recipient of numerous awards, including the Kappe, Freese, and Feng lectures and the Harrison Prescott Eddy, Morgan, and the Gascoigne Awards from WEF. A member of a number of professional societies, Dr. Daigger is also a member of the National Academy of Engineers.