David Hansen is a Consultant/Project Manager employed with GCI Consultants since 2015. He has over 26 years of experience in the design of custom project-specific glazing systems, creating system plans to suit architectural design, along with orchestrating installation methods for glazing systems installed on every type of project from high-rise curtain wall to low-rise window wall. He has worked extensively in the construction of new projects along with the investigation and correction of existing wall cladding systems illustrating performance issues. He has been involved in the testing of new construction to the forensic investigations of existing structures. In addition, he serves as a litigation support consultant and expert witness in disputes related to exterior wall, window and glazing system installation and performance.