Since 2006, Mark has served as Research Scientist for AquaShield, Inc., a manufacturer of stormwater treatment systems headquartered in Chattanooga, Tennessee. He is responsible for product development, domestic and international regulatory affairs, and directs lab- and field-testing programs. Mark is a member of the City of Chattanooga Stormwater Regulations Board. He holds an M.S. in Geology from Centenary College in Shreveport, Louisiana and a B.A. in Geology from the University of Tennessee, Knoxville.