Deepwater Offshore Specialty Symposium (DOSS-2009) is being organized by Harbin Engineering University (HEU) and the Ocean, Offshore and Arctic Engineering Division of ASME International (OOAE). It will be held from Jan 16-19, 2009 in Harbin, China. Harbin Engineering University will host the symposium.HEU successfully held the 1st International Symposium on Deepwater Offshore Technology in April 2006. The purpose of the symposium is to provide a timely international forum for researchers and engineers interested in “Challenges in Modeling of Deepwater Structures” and to promote technical cooperation at an international level. We hope that this occasion will provide an excellent opportunity for researchers and engineers to discuss technical progress and cooperation. This symposium will also invite several senior experts to give educational short courses on deepwater floating structure analysis, and riser and mooring system engineering, which will provide a good opportunity to look into the correlative knowledge and outlook in the development of deepwater offshore technology area.