Founded in 1902, Harold O Shea Builders is one of the leading general contractors in Illinois. It offers design, build, construction management and preconstruction planning services. The company specializes in integrated project delivery systems for health care, retail, religious, financial, commercial, senior living, entertainment and parking structures. Harold O Shea Builders provides site analysis and selection services, as well as demolition, excavation, steel erection, rough carpentry, insulation, concrete finishing, and doors and hardware installation services. Additionally, the company undertakes various hospitality projects.