_______ study past human activity by excavating, dating and interpreting objects and sites of historical interest. They implement excavation projects, informally known as digs, preserve remains and collect data that informs their understanding of the past. Although fieldwork usually takes place in teams, it is possible to work on a self-employed basis. Temporary contracts are common. With experience, there is scope for consultancy work. Opportunities for national and international travel may arise through different dig locations, consultancy work with international development organisations, or through attendance of professional conferences.