Serving as a Principal and Building Envelope Department Manager at ECS Mid-Atlantic LLC, Keith brings over 20 years of professional experience to technical and complex building enclosure design and failure investigations. He is a Licensed Architect in several states and an ASHRAE Certified Building Commissioning Professional. Mr. Nelson earned his Bachelor of Science in Environmental Design and Bachelor of Architecture from Ball State University. Keith serves on the ASHRAE 90.1 Building Envelope Subcommittee and a current member of ASHRAE 160 Hygrothermal Analysis Technical Committee. He participates in ASTM E06.55 Performance of Buildings and ASTM E06.41 Air Barriers. Mr. Nelson provides training nationally on the topics of Building Science & Building Enclosures, coauthored the Building Enclosure Commissioning chapter of The Building Commissioning Handbook (3rd Ed.), and was co-chair and co-editor of ASTM STP 1615 “Whole Building Air Leakage: Testing and Building Performance Impacts.” He is the father of three amazing girls, a fan of Star Wars, and husband to a wife he does not deserve.