Conference Organization/Chair

Member of Steering Committee, AAAI International Conference on Weblogs & Social Media: 2015-19 (ICWSM)
Program Co-chair, AAAI International Conference on Weblogs & Social Media: 2014 (ICWSM)
Sponsors Chair, AAAI International Conference on Weblogs & Social Media: 2013 (ICWSM)
Area Co-chair, "Social Media & Presence", at ACM Multimedia: 2013 (MM)
Track Co-chair, "Social Media", at the ACM Hypertext and Social Media: 2012 (HT)

Senior Program Committee / Program Committee Member (Conferences)

ACM SIGCHI Conference on Human Factors in Computing Systems (CHI): 2015, 2016
International Conference on Computational Social Science (IC2S2): 2015
ACM Conference on Web Search and Data Mining (WSDM): 2012, 2014-2016
International World Wide Web Conference (WWW): 2012, 2014, 2015
Annual Meeting of the Association for Computational Linguistics (ACL): 2014-15
European Chapter of the Association for Computational Linguistics (EACL): 2014
ACM Multimedia Conference: 2015
iConference: 2015
ACM SIGCHI Student Research Competition (SRC): 2014
International Conference on Social Informatics (SocInfo): 2014-15
ACM Conference on Bioinformatics, Computational Biology & Health Informatics (BCB): 2014-15
Annual Meeting of the Association for Information Science and Technology (ASIS&T): 2014
International Joint Conference on Artificial Intelligence (IJCAI): 2013
Conference on Empirical Methods in Natural Language Processing (EMNLP-CoNLL): 2012
International AAAI Conference on Weblogs & Social Media (ICWSM): 2011-13, 2015
IEEE International Conference on Social Computing (SocialCom): 2010-12
ACM Conference on Hypertext (HT), "Social Linking" track: 2011-14
Intl Conf on Advances in Social Network Analysis and Mining (ASONAM): 2011-14
Indian National Conference on HCI: 2014
ACM Multimedia Systems Conference, ``Datasets" track (MMSys): 2013

Program Committee Member (Workshops)

5th workshop on Making Sense of Microposts, colocated with WWW 2015: 2015
IEEE/CIC ICCC Symposium on Social Networks and Big Data (SNBD): 2014
Workshop on Computational Linguistics and Clinical Psychology (CLCP): 2014
Workshop on Language Technologies and Computational Social Science: 2014
Workshop on Social Multimedia and Storytelling (SoMuS): 2014
Workshop on Computational Approaches to Social Modeling (ChASM): 2014
Computational Social Science Workshop: Social Contagion, Collective Behaviour, and Networks: 2014
Computational Social Science Winter Symposium: 2014
International Workshop on Socially-Aware Multimedia (IWSAM): 2012, 2014
ACM SIGIR Workshop on Health Search and Discovery (HSD): 2013
Data-driven User Behavioral Modelling and Mining from Social Media: 2014
Workshop on Language Analysis for Social Media (LASM): 2011-14
Intl. Workshop on Real-Time Analysis & Mining of Social Streams: 2012-13
Workshop on Privacy and Security in Online Social Media: 2012-13
International Workshop on Modeling Social Media (MSM): 2012-13
Workshop on Social News On the Web (SNOW): 2013-14
Workshop on Social Media, in conjunction with ACM Multimedia: 2011


ACM Trans. on Knowledge Discovery from Data (TKDD) Special Issue: Connected Health at Big Data Era, Eds: Hanghang Tong, Fei Wang, Munmun De Choudhury, Zoran Obradovic.

Workshops/Symposia Organized

BigCHat: KDD Workshop on Connected Health at Big Data Era: 2014-15
AAAI 2015 Symposium on Observational studies through social media and other human-generated content
First Workshop on Social Computing for Workforce 2.0: 2013

Journal Referee

PLoS one
ACM Trans. on the Web (TWeb)
ACM Trans. on on Computer-Human Interaction (TOCHI)
ACM Trans. on Information Systems (TOIS)
ACM Trans. on Knowledge Discovery from Data (TKDD)
ACM Trans. on Multimedia Computing, Communications and Applications (TOMCCAP)
ACM Trans. on Intelligent Systems and Technology (TIST)
New Media and Society
ACM Computing Surveys
Computational Linguistics
Journal of Computational Science
IEEE Transactions on Multimedia
IEEE Transactions on Knowledge and Data Engineering
Decision Support Systems
Machine Learning Journal
World Wide Web Journal
Information Systems Research
Journal of Complexity
International Journal on Artificial Intelligence Tools
Journal of Medical Internet Research
Forum for Health Economics & Policy
Springer EPJ Data Science
Elsevier Computer Methods and Programs in Biomedicine
Elsevier International Journal of Human-Computer Studies
Elsevier Information Systems

External Reviewer

CSCW 2011-2015
CHI 2011-2014
iConference 2015 UIST 2014
GROUP 2012
JCDL 2010
WWW 2010
ACM workshop on Social Network Mining and Analysis 2009
International Conference on Multimedia & Expo 2009
ACM Multimedia 2009