Guimaraes, who prior to the appointment worked at a local newspaper in Lisbon, will lead a five-strong press relations team. She will report to Miguel Almeida Fernandes, the agency's president.
Guimaraes will work with the firm's top clients, which include major transport, insurance and agricultural companies, as well as universities, but which Unimagem declined to name.
Launched in Lisbon in the early 90s, Unimagem is a full service PR shop focusing on institutional and financial PR. The agency employs 16 people.