Haggai Roitman  Haggai Roitman photo         

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STSM, Lead Researcher - Master Inventor - Language & Retrieval
IBM Research AI



I'm a senior technical staff member, lead researcher and a master inventor - a member of the Language & Retrieval research group @ IBM Research AI. 

Within IBM, over the years, I have led and been involved in numerous R&D projects in various scales and diverse domains such as Search (Discovery) & Content Analysis,  Social Media Analysis, Telco, Services, CRM, Commerce, Marketing and Consumer Products, and Healthcare. 

My current research focus is mainly on information retrieval and NLP.
I also used to work (and still work from time to time) on problems related to recommender systems, social media and semantic Web. 

In information retrieval, I'm mainly interested in core IR theory (query performance prediction, focused retrieval, fusion and recently also neural IR). I also investigate the application of unsupervised and semi-supervised learning methods for search quality assement and optimization. 

In NLP, my main research focus is on automatic text summarization (extractive, abstractive, query-based). 
I'm also interested in conversational search and interactive ("human-in-the-loop") natural language generation. 

I'm an active member in the SIGIR research community, including numerous academic publications, PC memberships, workshops and tutorial organizations. I won the ACM ICTIR'2018 Best Paper Award. 

In IBM Research, I serve as a co-chair of the Knowledge PIC, responsible for IR area. 
As a master inventor in IBM, I have filed more than 50 patents (25 issued so far). 

I'm also an adjunct lecturer in the computer science department in the University of Haifa, teaching various (under)graduate courses (Web programming, databses, information retrieval, advanced seminars). 

I hold a B.Sc degree in information systems engineering (2004 - Cum Laude) and a Ph.D degree in information management engineering (2008 - supervised by Prof. Avigdor Gal), both from the Technion - Israel institute of technology.