The aim of this project is to reinforce the System of Science of the Basque Country, attracting excellence scientistsfrom any country, in order to consolidate the Basque Region as a European Reference Point for excellence in research.Ikerbasque is a Foundation fostered by the Basque Government to strengthen the Basque Science System by means ofattracting senior researchers.The new call, to be launched by Ikerbasque, will host incoming (non national and non resident researchers) and reintegrating (national and non resident) experienced researchers. The researchers must demonstrate their experience in, at least, one of the following researchareas: Experimental sciences (Chemistry, Physic, Biology, Mathematics, Biophysics); Engineering and Technology (Chemical Engineer, Telecommunication, Industrial, Electrical and Electricity Engineer); Life Sciences (medicine); Social Sciences (economy, law, social psychology); Human Sciences (Psychology, Linguistics, History). The calls have regular selection rounds for experienced researchers based on an open and widely advertised competition, with transparent international peer review and selection of candidates based on their scientific excellence. The selection process assures no discrimination of researchers for any reason. The selected researchers will have a permanent contract and all the freedom to choose their own research programme, as well as the host institution amongst the universities, research centres and different laboratories that have an agreement with Ikerbasque. That research programme will fit his/her individual needs, providing the best conditions for his/her personal objectives and for the development of a valid research project. A special regard is given to working conditions and career development.