 His brother, Peter Mossack, was the Panamanian Consul in Frankfurt.In 1975, Mossack worked as a lawyer in London before returning to Panama to start a firm in 1977.Mossack’s practice only became Mossack Fonseca in 1986, when it merged with the firm run by Ramón Fonseca Mora, a Panamanian novelist, lawyer, and politician.