Sponsored by IEEE Computer Society's Technical Committee on Services Computing (TC-SVC), 2015 IEEE World Congress on Services (SERVICES 2015) aims to serve as a federation to host the several theme topic conferences (CLOUD 2015, ICWS 2015, SCC 2015, MS 2015) to explore the deep knowledge space of Services Computing in different directions. SERVICES 2015 will also co-locate with 2015 International Congress on Big Data (BigData 2015). SERVICES 2015 presents keynote sessions, panel discussions, plenary poster sessions, innovation show cases, job fair, Services University (Summer School), "CLOUD Cup" contest, Cloud industry summit, workshops, and Ph.D. symposiums. Papers published in plenary poster sessions, "CLOUD Cup" contest, Global Cloud Industry Summit, Workshops, and Ph.D. symposiums will be included in the Proceedings of 2015 IEEE World Congress on Services (SERVICES 2015), indexed by EI.