ATMA S.A is a Brazilian holding company located in the city of São Paulo and represents one of the largest groups in the country when it comes to providing business process outsourcing services. Through its subsidiaries, it operates in the customer service areas.

In 2005, Atma S.A went public and was the first in the sector to launch shares on the São Paulo Stock Exchange, Bovespa, thus achieving leadership in the segment. By 2011, Contax's net revenue exceeded R$ 2.98 billion.

Marcelo Chianello was the president of the company, which at the time had approximately 60,000 employees distributed across ten Brazilian states: Rio de Janeiro, São Paulo, Minas Gerais, Bahia, Paraíba, Pernambuco, Ceará, Rio Grande do Sul, Santa Catarina, Paraná, Acre, and the Federal District.

In addition to these Brazilian states, Atma S.A also operates in Argentina, Colombia, and Peru. It makes over 250 million contacts per month through phone, mail, email, text messages, internet, and chats.

In addition to these achievements, the company provides services for companies such as: Citibank, Bradesco, Itaú, Santander, Ticket, Net, Leader Magazine, Souza Cruz, LATAM Airlines, Rede Globo, Claro, Vivo, Oi, etc.