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.
In my current role I’m responsible for driving innovation in information-retrieval (IR) into IBM Watson products (specifically Discovery/Assistant offerings), with a focus on AI-driven customer care and AI4IT initiatives. Specifically, these days my R&D efforts are dedicated to the following problems:

  • Conversational-Search (utilization of human2bot and human2human dialog context for enhanced information discovery).
  • Automatic text summarization (query-based, generic, extractive and abstractive methods).
  • Natural language and ad-hoc discovery (passage-retrieval, answer quality prediction, structured-retrieval, fusion, formal retrieval models, neural IR).

The outcomes of my work have been published in numerous (80+) academic papers in top-tier conferences and journals. I'm an active member of the SIGIR/AI research community, including PC memberships, workshops and tutorial organizations. I have won the ACM SIGIR ICTIR 2018 best paper award. Within IBM, I have been recognized with multiple awards for contributing to IBM’s products and innovation. I’m an IBM master inventor (elected already for three times in a row, each time for a 3-year term, being recognized for strong IP contribution of 60+ patents to count).

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, Telco, Services, CRM, Commerce, Marketing, and Healthcare.
While my main research focus and expertise is information retrieval (IR), I also used to work (and still work from time to time) on problems related to recommender systems (personalization), social media, content management, NLP, Semantic Web and Web monitoring.

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.
My research thesis was: Profile-based Online Data Delivery - Model and Algorithms