Some individuals don’t have to have a work permit to do work in Spain. However, they may still need a visa to be able to enter into Spain. Examples of those who may be exempt from needing a work permit to be able to work in Spain include university professors, technicians, and scientists, those coming to Spain to develop scientific or cultural programs, foreign journalists, artists coming for specific performances, clergy, and trade union officials. There are no visa or work permit restrictions if you would like to come to Spain to carry out volunteer work.