In 1965, António Oliveira Madaleno became a Dispatch Accountant for the late Customs Brocker Vieira Barros and later for the late Customs Brocker Luís Alves Ferreira (considered by many to be perhaps the best, if not the best Customs technician that has ever existed in Angola).

Between 1977 and 1988 António Oliveira Madaleno was in political exile in Portugal. After his return he worked with the Customs Brocker Caçador until 14 September 1995, when he was appointed Customs Brocker.

After studying in Portugal and returning to his homeland in 2000, where he began working with his father in the Customs area, José Carlos Madaleno, took the Customs Brocker Assistant exam in 2002.

In 2006, after José Carlos Madaleno was appointed Customs Brocker, father and son founded TRANSMAD-TRANSITÁRIOS, LDA, under the Slogan "We are not all equal"

6 years after the creation of Transmad, in Angola José Carlos Madaleno joined his daughter Sofia Salgado and created ANGOTRANSMAD-TRANSITÁRIOS, LDA in Portugal, having been the first Angolan Freight Forwarder Company to open doors in Portugal