Dr. Walker is a professor in the Department of Civil, Environmental, and Construction Engineering at Texas Tech University, and he serves as the Director of the Water and the Environment Research (WATER) Center.

Dr. Walker teaches courses such as physical/chemical treatment processes and design of advanced water treatment systems, and his research focuses on advanced water treatment, especially high recovery inland desalination, potable reuse, and treatment of produced water for beneficial uses. Dr. Walker received a B.S. in Civil Engineering from Texas Tech University, and he received M.S. and Ph.D. degrees in Environmental & Water Resource Engineering (Civil Engineering) from the University of Texas at Austin. He was previously a professor at The University of Texas at El Paso (UTEP) and Director of the Center for Inland Desalination Systems (CIDS). Dr. Walker is the proud husband of his high school sweetheart and the proud father of their four children.