This document provides information for speakers at the 2015 What's Big in Big Data conference. It outlines contact details for event organizers Gilbert Roy and Lili Yusoff. It details the speaker's presentation schedule, including sessions on big data overview, challenges, needs, benefits and technologies. It also describes workshop sessions on implementation strategies and industry use cases. Registration details and passes for attendees are provided. The final event agenda can be found online at the conference website.