The Department of Humanities, Social and Political Sciences (D-GESS; www.gess.ethz.ch) at ETH Zurich invites applications for two professorships, one in History of Technology, the other in Philosophy of Science. We are looking for two researchers with an outstanding record in philosophy, history or neighbouring disciplines whose research focuses (a) on the history of technology and (b) on the philosophy of science. The search is also open to candidates who combine historical and philosophical methodologies and to those who combine them with other related methodologies. The candidates should essentially contribute to the historical and critical reflection on science and technology at ETH Zurich. They should contribute to the ETH Science in Perspective and History and Philosophy of Knowledge Master teaching programs. The language of instruction at D-GESS can be either English or German. The ability to lead a research group is expected.