Following the success of the first two editions of the IEEE workshop on Computational Advances in Multi-Channel Sensor Array Processing, we are pleased to announce the third workshop in this series, sponsored by the Sensor Array and Multi-channel signal processing Technical Committee of the IEEE Signal Processing Society. CAMSAP 2009 will be held at the Radisson Aruba Resort, Casino & Spa in the Aruba Island, and will feature a number of plenary talks from the world’s leading researchers in the area, special focus sessions, and contributed papers. All papers will undergo peer review in order to provide feedback to the authors and ensure a high-quality program.