He has also been Ambassador Extraordinary and Plenipotentiary to Belgium, France, Germany, the Netherlands, Sweden, the European Community, and the Food and Agriculture Organization.

[4] In early November 2004, Posser da Costa allegedly damaged the office of Attorney General Adelino Pereira in an attack.

[4] On 18 March 2005, he received a two-year suspended sentence for damaging Pereira's office and "insulting public authority"; he was also required to pay compensation.

For his part, Posser da Costa said that Pereira had falsely accused him of being involved in the embezzlement of aid funds, and that he had only been a witness in that case, not a suspect.

Although he won the support of the MLSTP/PSD National Council with 83% of the vote, his competitors for the nomination chose to register as independent candidates in the election.