One O'Hare Centre

PolyScience, a division of Preston Industries, is one of the leading manufacturers and distributors of temperature control equipment in the world. It has received ISO 9001:2000 certification from the International Organization for Standardization. Founded in 1963, the company produces variety of industrial products, such as turbine pumps, computer numerical control lathes, printers, bioreactors, condensers, electron microscopes, lasers, portable chillers, vacuum systems, and lithographic, welding and die casting equipment. It additionally provides heat exchangers, water baths, pressure reducers, flask holders, concentric rings, tubing clamps, and refrigerated and heating circulators. The company offers design, engineering, technical support, testing, inspection and transportation services. It serves the laboratory, laser, pharmaceutical, plastic, chemical and medical industries. PolyScience is headquartered in Niles, Ill.

Keeley Construction specializes in construction, development and tenant improvement services. Founded in 1978, it offers conceptual planning and design, preliminary estimation, project management, site layout, historical restoration and structural improvement services. The company provides project consulting services. It undertakes several residential, commercial, institutional and industrial projects. Keeley Construction has offered services for various clients, including ProLogis, Venture One, The Westye Group and Ridge Property Trust. The company has a staff of trained and certified employees who provide maintenance, customized design, renovation, preconstruction and general contracting services. It additionally offers project consulting and customer support services. Keeley Construction is located in Villa Park, Ill.