I am a Research Scientist, General Manager, and Deputy Lab Director at Microsoft Research in Redmond, leading the LEAP (Language, Learning, Audio, Privacy) research area (five research groups), the Central Engineering organization, and the Research Technology Engineering organization.

I am also an Affiliate Full Professor at the University of Washington. I led applied science for Cortana and I was chief scientist at Microsoft Health. I have shipped research in many Microsoft products, including Bing, Xbox, Internet Explorer, Skype, Dynamics, Health, Windows, Cortana, Office (Outlook, Teams, Planner, To Do, Word), and Azure.

I am a Fellow of the ACM (Class of 2021), elected for "contributions to information retrieval, human-computer interaction, and computational health".

I am a member of the ACM SIGIR Academy and the ACM SIGCHI Academy.

I am serving as Vice Chair of ACM SIGIR (until 2025) and as Editor-in-Chief of ACM Transactions on the Web (second and final term runs until 2027).

I received the 2022 Tony Kent Strix Award for "prolific and significant contributions to information retrieval". See slides from my memorial lecture.

I gave a keynote at ACM SIGIR 2023 in Taipei. Download PDF for my writeup in Communications of the ACM and see my keynote slides.

My book "Interactions with Search Systems" received the 2017 ASIST Best Information Science Book Award. Download PDF from here.

I was technical program co-chair for the 28th Web Conference (WWW 2019). I am also Seoul Test of Time Award chair for The Web Conference series.

I received the 2014 Microsoft BCS/BCS IRSG Karen Spärck Jones Award for contributions to information retrieval. See slides from my ECIR 2015 keynote.

I was program co-chair for SIGIR 2017, the top search conference. At SIGIR 2017, I was identified as "Center of the SIGIR Universe," for being the author most central in the co-authorship graph in the 40 years of the ACM SIGIR conference.

I was founding chair of the series of ACM SIGIR Conferences on Human Information Interaction and Retrieval (CHIIR), pronounced "cheer."

We received the SIGIR 2022 Test of Time Award for Modeling the Impact of Short- and Long-term Behavior on Search Personalization.

I received the SIGIR 2013 Best Paper Award and the SIGIR 2023 Test of Time Award for Beliefs and Biases in Web Search.

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 (BCS) Distinguished Dissertation Award for the best Computer Science PhD dissertation in the United Kingdom for 2005. I am a Fellow of the BCS.