The Idiap Research Institute is currently seeking candidates for one PhD position in the area of automatic speech recognition. The position is funded by a new EU Horizon 2020 project ATCO2, a research project on long term unsupervised adaptation of the acoustic and the language models of a speech recognition system. The research will be carried out together with a European consortium of high-profile research institutes and companies. The technical development will be centred around the project platform, which will allow to automatically record and annotate the voice recordings.