Research and development leadership in the areas of statistical machine learning, data mining, and large-scale algorithms. An impressive career trajectory at top industrial research organizations including Microsoft, Yahoo!, and eBay. A superb track record of deployments of behavioral targeting, recommender systems, click and conversion prediction, real-time bidding, for display advertising, sponsored search, and online marketplaces. Designed and implemented the next-generation behavioral targeting system for Yahoo!, the next-generation recommender system for eBay, click and conversion prediction, impression value prediction, real-time bidding, and query clustering for auction optimization algorithms for Microsoft. First-authored patents in behavioral targeting, sponsored search, large-scale user clustering, recommender systems, real-time bidding for performance ads, Hadoop and grid implementation. First-authored publications in NIPS, KDD, SIGIR, WWW, among others. Our behavioral targeting paper won the Best Application Paper Award at KDD '09, our recommender system paper won the Best Paper Honorable Mention Award at SIGIR '11, and our query clustering for sponsored search auction optimization paper won the Best Industry Government Paper Award Runner Up at KDD '13.