Paulo Misk has been promoted to president of Brazilian operations of Vanadio de Maracas SA, succeeding Kurt Menchen.
Menchen retired from the position in December, but remains a director of Maracas and has entered into a contract for services to provide continuing assistance to the company.
In another move, Nilson Luciano Chaves will take on the role of vice-president of finance and administration.
Mark Smith, president and chief executive officer of Largo, said: “Mr Misk joined Largo in 2014 as the project's general manager and has played a crucial role in the project's ramp-up phase.
“Both Mr Misk and Mr Chaves contribute a wealth of experience to the project, and I have complete confidence they will continue the ongoing success at the Maracas Menchen mine."
Additionally, the company announced that its chief legal officer, John Ashburn, has resigned, and Largo's chief operating officer, Michael Mutchler, has left the company to pursue other opportunities.