I am a member of the Relevance and Measurement team of Microsoft that I joined in October 2012. I work in improving Bing’s quality by providing better metrics. My current research interest is in the area of information retrieval (IR) focusing on the use of statistics and machine learning techniques to develop web scale offline and online metrics for search engines. I am also interested in using Natural Language Processing (NLP) technologies to add a layer of semantics and understanding to search engines. I am a believer that next generation search engines will be based on dialog and language understanding. Prior to joining Microsoft, I worked as a research member for IBM Research in the Multilingual NLP group for almost a decade, where I served as team-lead in several NLP projects. During this time, I was again focusing on NLP, IR, machine translation, speech-recognition, language modeling and machine learning. I was key member of several government projects including the GALE (Global Autonomous Language Exploitation) program. Prior to IBM, I was a research member of Bell Laboratories, Lucent Technologies, for almost half dozen years working on language modeling, speech recognition, spoken dialog systems and speech understanding. During the last few years at Bell Labs, I was also in charge of the speech and natural language call routing activities leading a small team of very talented researchers. Prior to Bell Labs, I experiment the startup experience at DIALOCA in Paris, France, working on e-mail steering and language modeling. I also served as temporary assistant professor at the University of Nancy 1, France. I received my M.Sc. and Ph.D. with the highest-honors from the University-of-Nancy1 France. In 1995, I obtained a MEng degree in computer science from ENSI in Tunisia. I am a senior member of IEEE, served as a member of the IEEE Speech and Language Processing Technical Committee (99-11), the Information Officer of the ACL SIG on Semitic-Languages, associate editor of TALIP ACM journal and a member of ISCA and ACL. I served as chair and reviewing-committee-member of several conferences and journals. I am the author/co-author of more than 80 papers in international conferences and journals. My recent book is “Multilingual Natural Language Processing Application: from Theory to Practice”, by Prentice Hall.