Founded in 1981 by Reynaldo Andrade da Silveira and Jorge Alex Athias, it was called Silveira & Athias S / C - Advogados Associados (associated);

In 1986, Soriano de Mello Advogados Associados, integrated by Juarez and Ricardo Soriano de Mello, was created. In 1989, Gilberto Guimarães (in memorian) merges with the two and forms Soriano de Mello & Guimarães S / C - Advogados Associados, which merged with Silveira & Athias in 1991, changing its name to Silveira, Athias, Soriano de Mello & Guimarães S / C - Advogados Associados;

In 1993, the firm incorporated the Pinheiro office, by Pedro Bentes Pinheiro Filho, and from then, its name became Silveira, Athias, Soriano de Mello, Guimarães & Pinheiro S / C - Advogados Associados;

In 1999, its expansion began, with the opening of units in São Luis, Maranhão, and Brasília, in the Federal District.

Still in 1999, the current configuration was defined, through a merger with the office of Fernando Facury Scaff, which had been created in 1988, from then on, becoming Silveira, Athias, Soriano de Mello, Guimarães, Pinheiro & Scaff - Advogados;

In July 2003, Afonso Lobato, who had started in the office as an intern and performed an expressive career in the law firm, became a partner;

In June 2005 the Manaus (AM) unit was opened, and as of July 2007, Cláudio Flores, who managed the civil area at the Belém office, became a partner and coordinates the activities of the Manaus Unit (AM);

In 2007, the office started a strategic expansion towards the Southeast, where it opened the São Paulo and Rio de Janeiro offices;

Due to client demand, in 2008 two new units were opened in the interior of the State of Pará, in Parauapebas and Marabá;

In 2008, Silveira, Athias, Soriano de Mello, Guimarães, Pinheiro & Scaff - Advogados was nominated for the first time as one of the most admired firms in the country by the yearbook Análise Advocacia 500.

In July 2010, the firm expanded its operations to the State of Rondônia, with the new Porto Velho unit, in addition to increasing its coverage in the State of Pará with the Santarém unit;

In 2011, the firm completed 30 years of existence and, with an eye on the future and the constant search for excellence in its service, creates a new policy for valuing talents, with the expansion of the corporate structure.

In 2013 the Chambers and Partners Latin America Guide lists Silveira, Athias, Soriano de Mello, Guimarães, Pinheiro & Scaff - Advogados as the most relevant law firm in the North of the country for the first time.

In 2014, in order to meet the interests of customers in international territory, with interests in Brazil, the New York (USA) unit was opened, whose purpose was fully achieved by the end of 2016..