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Key Personnel
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 L.M. (Mac) Safley, Jr., Ph.D., P.E.
Founder/President Emeritus
B.S. University of Tennessee, Agricultural Engineering
M.S., Ph.D. Cornell University, Agricultural Engineering
Dr. Safley is a registered Professional Engineer in over 30 states in the United States, and in the province of Saskatchewan, British Columbia. Before founding AWT in 1984, Dr. Safley was a professor at N.C. State University, where he now serves as an Adjunct Professor. He has authored and co-authored numerous articles and technical papers that have been published both nationally and internationally. Dr. Safley is also a nationally known published expert witness in the agricultural field. Dr. Safley is a member of the American Society of Agricultural Engineers, National Society of Professional Engineers, and the North Carolina Irrigation Society.
 Jeffrey Vaughan, Ph.D., CPAg/SSc/CCA, L.S.S.
President/Senior Soil Scientist/Agronomist
B.S. Virginia Polytechnic Institute and State University, Agronomy
M.S. Virginia Polytechnic Institute and State University, Crop and Soil Environmental Sciences
Ph.D., North Carolina State University, Soil Science
Dr. Vaughn has served AWT since March of 1998 as the team leader of the Agronomy / Soil Science division. Dr. Vaughan is a Certified Crop Advisor, Certified Professional Agronomist, Associate Professional Soil Scientist, Licensed Soil Scientist, and a Subsurface Water Pollution Control System Operator. Dr. Vaughan is a member of the American Society of Agronomy, Soil Science Society of America, and the Soil and Water Conservation Society.
 Chris Mosley, P.E.
Vice President
B.S. North Carolina State University, Biological and Agricultural Engineering
M.S. Purdue University, Biological and Agricultural Engineering
Mosley joined AWT in September of 2000. Mosley received his Professional Engineering licenses from North Carolina in 2003 and South Carolina in 2006. He is a Technical Service Provider (TSP) and a North Carolina Technical Specialist. Mosley is a member of the National Society of Professional Engineers and the North Carolina Society of Professional Engineers.
 Kevin Davidson, P.E.
Senior Project Engineer
B.S., M.S. North Carolina State University, Biological and Environmental Engineering
Davidson joined AWT in January of 1995. Davidson is a registered Professional Engineer in the states of North Carolina and Oklahoma. He has authored two papers related to the swine industry, both of which have been presented at technical conferences. Davidson is a member of the National Society of Professional Engineers and the North Carolina Society of Professional Engineers.
Hal Langenbach, P.E.
Senior Project Engineer
B.S. North Carolina State University, Biological and Agricultural Engineering
Langenbach joined AWT in July 1995, and received his Professional Engineering license for the state of North Carolina in 2000. Langenbach also holds a North Carolina DOT Level II Certification for Erosion and Sediment Control/Stormwater Site Management. Langenbach is a member of the National Society of Professional Engineers, North Carolina Society of Professional Engineers, and the American Society of Civil Engineers.
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