This book constitutes the refereed proceedings of the 8th International Conference, ICSOC 2010, held in San Francisco, CA, USA, in December 2010. The 33 revised full papers and three full industry papers, presented together with 18 short papers, three PhD symposium posters and four regular posters, were carefully reviewed and selected from 238 submissions. The papers are organized in topical sections on Service and Business Process Modeling; Service Management; Quality of Service; Service Science and Design; Service Development and Run-time Management; High-level Description Languages; Service Level Agreements; Service Engineering Methodologies; Service Security, Privacy, and Trust; Business Service Modeling; Formal Methods; and Service Applications.