Aecon Group Inc., together with its subsidiaries, provide construction and infrastructure development services to private and public sector clients in Canada, the United States, and internationally. It operates through two segments, Construction and Concessions. The Construction segment focuses primarily on the civil infrastructure, urban transportation systems, nuclear power infrastructure, utility infrastructure, and conventional industrial infrastructure market sectors. The Concessions segment engages in the development, building, construction, financing, and operation of construction projects by way of public-private partnership contract structures. The company was formerly known as Prefac Concrete Co. Ltd. and changed its name to Aecon Group Inc. in June 2001. Aecon Group Inc. was founded in 1877 and is headquartered in Toronto, Canada.