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Biography PhotoMark Stuart Day, Ph.D.
Chief Scientist

Mark Day, PhD., came to Riverbed from Cisco Systems (CSCO), where he was technical lead for content networking product management. Dr. Day was previously senior scientist at SightPath, which was acquired by Cisco in 2000. Before joining SightPath, Day was a research scientist and assistant to the CTO at Lotus/IBM, where his work contributed to the creation of Lotus Sametime (now called IBM Sametime).

Day has chaired Internet Engineering Task Force (IETF) working groups on Instant Messaging and Presence Protocol (IMPP) and Content Internetworking (CDI). He has more than twenty issued patents and multiple pending patents relating to presence, streaming media, content networking, mobile communications, and telephony. His other notable work includes contributions to the programming languages Argus and Theta, and to the distributed object database, Thor.

Day has held an adjunct appointment at Harvard University teaching graduate computer science, and received his Ph.D. from Massachusetts Institute of Technology (MIT) in 1995.

Riverbed. WAN optimization for your network: Application acceleration, WAN bandwidth optimization, and IT consolidation. Riverbed is the IT performance company. WAN optimization solutions from Riverbed liberate businesses from common IT constraints by increasing application performance, enabling consolidation, and providing enterprise-wide network and application visibility – all while eliminating the need to increase bandwidth, storage or servers. Thousands of companies trust Riverbed to deliver greater productivity and cost savings by making their IT infrastructure faster, less expensive and more responsive. Riverbed solutions are also available as managed services through select providers.