Matthew Farmer joined WJE in 1986 and has served as a principal investigator on numerous evaluations of concrete, steel, and timber structures as well as those involving clay, concrete, stone, and cast stone masonry. Mr. Farmer has concentrated his practice in the area of building enclosure systems engineering, design, investigation, analysis, and repair. He is frequently asked to consult on the design of specialized exterior wall cladding systems and as an expert witness for construction-related litigation. Projects have included institutional, commercial, and residential projects as well as numerous historic landmarks. Mr. Farmer served as the manager of the Washington, D.C. office from 1994 until 2006, when he became a principal with WJE. Prior to joining that office, he was a structural engineer with Skidmore, Owings & Merrill in Washington, D.C.