Teaching Assistant (Assistente Estagiário), Department of Botany, Faculty of Sciences, Porto University (1983-1989) Assistant (Assistente), Department of Botany, Faculty of Sciences, Porto University 1989-1999) Assistant Professor (Professor Auxiliar) (1999-2004) Assistant Professor (Professor Auxiliar com Nomeação Definitiva), after teaching and research curriculum evaluation (2004 onwards)