Gewalt Hamilton Associates (GHA) assisted Panduit Corp. with the development of their 52-acre World Headquarters located in Tinley Park. This 280,000 square foot, LEED Gold Certified project involved construction of three buildings, two naturalized detention basins, internal roadways, parking lots with bioswale islands, and 15.7 acres of compensatory storage open space. Sustainable design elements included a roof garden, rainwater harvesting, creation of wetlands, pervious surfaces, and bioswales. Major access improvements to W191st Street and S80th Avenue were completed.