I am a Senior Researcher at Microsoft Research, Redmond. I am a member of the CLUES group. My research interests lie at the intersection of information retrieval, data mining, and human-computer interaction. I study how people search for information in domains such as the Web and the enterprise, and develop tools to help people search more effectively, solve problems, and learn. My three current foci are search interaction, expertise modeling, and health seeking. Microsoft Lync shipped our IM an Expert system. Download: Installer|Documentation.

Our book entitled "Exploratory Search: Beyond the Query-Response Paradigm" was published in 2009.  Order: Morgan & Claypool|Amazon|Barnes & Noble. My new book on "Search Interaction" (to be published by Cambridge) is in progress.

I co-organize the annual Human-Computer Information Retrieval (HCIR) Symposium. HCIR 2013 will be held on 3-4 October 2013 in Vancouver, BC.

I serve as an Associate Editor for ACM Transactions on Information Systems (TOIS) and for ACM Transactions on the Web (TWEB).

We received a SIGCHI 2011 Best Paper Award for our paper
Effects of Community Size and Contact Rate in Synchronous Social Q&A.

We received the SIGIR 2010 Best Paper Award for our paper
Assessing the Scenic Route: Measuring the Value of Search Trails in Web Logs.

We received the SIGIR 2007 Best Paper Award for our paper
Studying the Use of Popular Destinations to Enhance Web Search Interaction.

I received the British Computer Society's Distinguished Dissertation Award for the best Computer Science PhD dissertation in the United Kingdom for 2005.