The 2015 IUCr High-Pressure Workshop will be held from September 12th to 15th at the CNPEM campus. The primary focus of the meeting will be recent scientific advances in high pressure techniques. Presentations will cover a variety of subjects in and related to high-pressure crystallography, including crystal structures, phase transitions and their kinetics, new materials synthesis, Earth and planetary science, soft and biological matter, physical and chemical properties, theory and computation, as well as technique developments for high-pressure studies at synchrotron, neutron and laboratory-based facilities.