Mata Pires is the Chief Executive Officer of Grupo OAS SA, and has an estimated net worth of $4.7 billion according to Bloomberg Billionaire Index. Grupo OAS SA is a conglomerate Pires founded in December 1976 in Salvador, Bahia, Brazil. It is based in Sao Paolo and operates in several countries in the field of civil engineering.

The construction arm of the OAS group is the source of three quarters of its business, and has netted contracts for the upcoming 2014 World Cup and 2016 Olympic Games.

As a result, Mata Pires had an addition to his fortune. However, he and his company had been the subject of the protesters across the country. Demonstrators were angered by the government’s decision to finance the construction of the arenas at the expense of the taxpayers. They claim that such move has only added wealth to the tycoons while neglecting public service.