Jülich Centre for Neutron Science (JCNS) operates instruments at leading national and international sources: at the FRM II research reactor in Garching, Germany, at the high-flux reactor at the Institute Laue-Langevin (ILL) in Grenoble, France, and at the first megawatt-class (MW) spallation source, SNS, in Oak Ridge, Tennessee, USA. These instruments are made available for external users to conduct experiments by means of a procedure whereby proposals are reviewed by an independent group of experts. Thus, JCNS offers its users access to state-of-the-art neutron instruments under consistent conditions at the neutron source, affording the best conditions for each individual experiment undertaken. JCNS provides 17 specialized neutron spectrometers at the world's top neutron sources, thus providing its users with outstanding quality. In addition, JCNS serves as the organizational framework for Forschungszentrum Jülich's globally recognized development programme for methods and instruments, as well as for its own research programmes in the field of Key Technologies.