He is a Sloan Research Fellow, and explores research topics broadly related to software systems including cloud computing, storage, networking, security, and big data. Andrew is the CTO at Coho Data, a Vancouver-based enterprise storage company that provides a scalable data platform based on high-performance nonvolatile memories. Dr. Warfield completed his PhD at the University of Cambridge, and has held technical positions at AT&T Research, Intel Research, XenSource, and Citrix.