Matthai Philipose is a researcher at Microsoft. He builds sensor-based systems that allow computers to understand and act on human state. Much of his work has focused on the statistical modeling of human activity. He is also known for applying such systems to the long-term care of the elderly. He has collaborated with corporate product groups, universities and government organizations to build and field-test novel telecare systems. He has published over 50 research papers and filed numerous patents. He has won several awards including a test-of-time award from ACM PLDI in 2004 and best paper in ACM ISWC 2005. His work on sensors for eldercare has been demonstrated at a US Senate hearing and at the US National Governors Association annual meeting. He worked at Intel for a decade before moving to Microsoft. He has a BS from Cornell University and a PhD from the University of Washington, both in Computer Science.