César de Araújo Mata Pires Filho

OAS SA is a holding company engaged in the provision of engineering and civil infrastructure construction services. Its projects include highways, railways, docks, airports, power plants, and water treatment facilities. It also undertakes design-build ventures such as hospitals, hotels, commercial centers, sports arenas, and residential spaces. The company was founded by Cesar Mata Pires, Durval Olivieri, and Carlos Suarez in 1976, and is headquartered in Sao Paulo, Brazil.

Novonor engages in infrastructure and energy solutions. Its services include engineering and construction, industry, development and operation of infrastructure and energy projects, creating integrated and innovative solutions that serve both its clients and its communities. The company was founded in 1981and is headquartered in Salvador, Brazil.