Four embassies

Appointment

Nominated by Senate Message MSF 21/2004, submitted on 3 February 2004. The Senate Foreign Relations Committee approved the nomination on 18 February and the full Senate on 5 May 2004, by 42 votes to 5 with one abstention; the appointment was published in the Diário Oficial on 7 May 2004.

Bilateral context

Argentina is Brazil's principal partner in South America. The two countries' rapprochement in the 1980s — the Declaration of Iguaçu of 1985 and the 1991 agreement creating the Brazilian-Argentine Agency for Accounting and Control of Nuclear Materials (ABACC) — laid the foundation for Mercosur, which both co-founded in 1991 with Paraguay and Uruguay.

The period

Vieira's six years in Buenos Aires coincided with the presidencies of Néstor Kirchner and Cristina Fernández de Kirchner in Argentina and of Luiz Inácio Lula da Silva in Brazil. This archive has not located official records documenting specific initiatives attributable to the ambassador personally, and it does not supply them.

Historical significance

A first ambassadorship to Brazil's most important neighbour placed Vieira at the centre of the regional agenda that would return, in a very different form, during his second ministerial term — when relations with Argentina's government became strained in 2026.

Appointment

Senate records indicate approval in late 2009. On 24 February 2010 he presented his credentials to President Barack Obama at a White House ceremony for newly arrived ambassadors, recorded by the State Department's Office of the Chief of Protocol.

Bilateral context

The United States recognised the independence of the Empire of Brazil in May 1824, and the two countries celebrated two hundred years of diplomatic relations in 2024. The US was Brazil's second-largest trading partner in 2024 and 2025, according to Brazil's official trade statistics.

The period

His tenure spanned the first and second Obama administrations and the first government of President Dilma Rousseff. It was the third time he had lived in Washington: he had served there as a junior diplomat from 1978 to 1982. In May 2013 Georgetown University awarded him an honorary doctorate.

Transition

The Diário Oficial of 2 January 2015 records his transfer from the Embassy in Washington to headquarters on taking office as Foreign Minister. Analysts noted at the time that his appointment reflected an interest in re-energising ties with Washington — a reading attributed here to commentary, not to official statements.

Appointment

Nominated by Message 393/2016 of 12 July 2016. The Senate approved the nomination on 16 August 2016 by 45 votes to 3 with one abstention. He presented his credentials to Secretary-General Ban Ki-moon on 11 November 2016, according to UN press release BIO/4898.

Institutional context

The Permanent Mission represents Brazil across the UN system in New York — the General Assembly, the Security Council when Brazil is a member, the Economic and Social Council and the Peacebuilding Commission. Brazil was not a member of the Security Council between 2016 and 2019; its terms bracketing the period were 2010–11 and 2022–23.

Documented activity

• Chair of the Guinea-Bissau configuration of the UN Peacebuilding Commission, in which capacity he briefed the Security Council on 14 February 2017 and chaired configuration meetings, including one on 14 May 2018.
• A visit to Guinea-Bissau in July 2018, on which he reported to the Security Council on 30 August 2018 in his capacity as configuration Chair, ahead of the country's legislative elections.

Close of the posting

His successor, Ronaldo Costa Filho, presented credentials to Secretary-General António Guterres on 6 February 2020.

Appointment

After a hearing before the Senate Foreign Relations Committee on 25 September 2019, the Senate approved his nomination on 16 October 2019 by 50 votes to 2 with 3 abstentions. On 17 March 2020 he presented his credentials to President Zoran Milanović, as recorded by the Office of the President of Croatia.

Bilateral context

Croatia, a member of the European Union since 2013, is among Brazil's smaller European relationships. The city of Split recorded the new ambassador's introductory visit.

The period

His arrival coincided with the onset of the COVID-19 pandemic in Europe. He was still ambassador in Zagreb when, on 9 December 2022, President-elect Lula announced him as the incoming Minister of Foreign Affairs.

Significance

A final head-of-mission posting before a return to the ministry's top office — a trajectory that, unusually, took him from a smaller European embassy directly to the leadership of Itamaraty.