Ion’s main research emphasis is on cloud computing and networked computer systems. Past work includes the Dynamic Packet State (DPS), Chord DHT, Internet Indirection Infrastructure (i3), declarative networks, replay-debugging, and multi-layer tracing in distributed systems. His current research includes resource management and scheduling for data centers, cluster computing frameworks, and network architectures. He is the recipient of a SIGCOMM Test of Time Award (2011), the 2007 CoNEXT Rising Star Award, a Sloan Foundation Fellowship (2003), a PECASE Award (2002), and the 2001 ACM doctoral dissertation award. In 2006, he co-founded Conviva, a startup to commercialize technologies for large-scale video distribution.