The University of Washington eScience Institute is hosting a NSF-sponsored Graduate Data Science Workshop that will bring together 100 graduate students from diverse domain sciences and engineering with Data Scientists from industry and academia to discuss and collaborate on Big Data / Data Science challenges. To participate in the workshop, submit a white paper in PDF format that describes a Big Data / Data Science challenge faced by your scientific or engineering discipline or an idea for a new tool or method addressing Big Data / Data Science problem. The white paper submission deadline is June 20th, 2015. Invitees will be notified on July 1st, 2015.