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Derek specializes in new construction design, remedial design, peer review, litigation investigation and expert witness services. His 30 years of construction experience provides a perspective of design, constructability, and practicality. Since joining McGinnis Chen Associates in 1998 he has developed extensive knowledge with all aspects of building envelope components as well as field testing methods. In addition to his extensive tenure with McGinnis Chen, Derek holds a Bachelor of Fine Arts Degree from the California College of Arts and is a practicing artist.