Haggai Roitman  Haggai Roitman photo         

contact information

Lead Researcher & Master Inventor - Language and Retrieval
IBM Research AI, Haifa, Israel


Professional Associations

Professional Associations:  ACM SIGIR


I'm a lead researcher and a master inventor at IBM Research AI - Haifa (HRL) - Language and Retrieval research group.

My research interests include Information Retrieval, Recommender Systems, Social Media and Semantic Web.
My main research focus these days is on core IR problems (e.g., Ranking, Focused Retrieval, Fusion, Query Performance Prediction) and emerging IR applications (Neural IR, Dynamic IR and Session Search, Conversational Search and Dialog, Natural Language Generation and Summarization).

I have published 70+ related academic papers and 50+ patents (20 issued so far). I'm actively involved in the research community, including the organization of several related workshops/tutorial, PC memberships and reviews in leading conferences and journals.

I serve as HRL's Knowledge PIC co-chair.

I'm also an adjunct lecturer in the CS department in the University of Haifa, teaching undergraduate and graduate level courses (Databases 101, Information Retrieval, Web Programming and various advanced seminars). 

I received the B.Sc degree (2004) in information systems engineering and the Ph.D (2008) degree in information management engineering under the supervision of Prof. Avigdor Gal, both from the Technion - Israel Institute of Technology.