Van Dunem's professional activities included judicial activities such as Trainee Deputy Public Prosecutor (Lisbon and Loures courts) (1979-1980); Deputy Public Prosecutor (Lisbon Labour Court) (1980-1983); Deputy Public Prosecutor (Lisbon Criminal Court) (1983-1985); Deputy Public Prosecutor (Lisbon Public Prosecution Service) (1987-1989); member of the Principal State Prosecutor's private law firm (1989-2001); and Deputy Principal State Prosecutor, Director of the LisbonPublic Prosecution Service (from 2001).[4]
Van Dunem first served as Minister of Justice in the 21st Portuguese government (2015-2019). In early 2021, she faced calls for resignation amid revelations that her ministry had overstated the qualifications of its nominee for Portugal's seat at the European Public Prosecutor's Office (EPPO).[5]