Ballinger is an architecture and engineering firm based in Philadelphia, Pennsylvania. The firm was founded in 1878 and has since grown to become one of the largest architecture firms in the United States. Ballinger provides a range of services, including architecture, engineering, interior design, planning, and sustainability consulting. The firm has worked on a variety of projects, including healthcare facilities, academic buildings, research laboratories, and corporate offices. Ballinger is known for its commitment to sustainability and has received numerous awards for its green building designs.