Editors

• Guest co-editor, special issue on "Learning to Combat Online Hostile Posts in Regional Languages during Emergency Situations", Neurocomputing, 2020
• Book editor, "Fake News, Disinformation, and Misinformation", Springer, 2019
• Guest co-editor, special section on "Fusion of Deep Learning Methodologies and Applications for Fake News on Social Media", IEEE Access, 2019

Book/Book Proposal Review

• CRC Press/Taylor and Francis
• Springer

Panel and Review for Funding Agencies

• NSF (2021, 2023, 2024)
• Israel Science Foundation (ISF), 2022
• Natural Sciences and Engineering Research Council of Canada (NSERC), 2021
• Air Force Office of Scientific Research (AFOSR), 2021
• Swiss NSF, 2021
• Army Research Office (ARO), 2023

Chairs, Organizers, and Panels

• Co-organizer, Preventing and Detecting LLM Misinformation (PDLM), colocated with AAAI 2025.
• Special Sessions Co-Chair, The 12th IEEE International Conference on Data Science and Advanced Analytics (DSAA 2025).
• PC Vice-Chair, The 15th BenchCouncil International Symposium on Benchmarking, Measuring, and Optimization (Bench) 2023.
• Keynote speaker, The 3rd International Workshop on Knowledge Graphs for Online Discourse Analysis (Beyond Facts 2023), Collocated with TheWebConf'23
• Workshop and Tutorial Chair, Bench 2022
• Keynote speaker, The 10th International Workshop on Natural Language Processing for Social Media (SocialNLP), Collocated with TheWebConf'22
• Co-organizer, Second Workshop on Combating Online Hostile Posts in Regional Languages during Emergency Situations (CONSTRAINT 2022), Collocated with ACL 2022.
• Associate Editor, Frontiers in Computer Science
• Associate Editor, Frontiers in Public Health
• Co-organizer, Second International MIS2 Workshop: Misinformation and Misbehavior Mining on the Web (MIS2 2021), collocated with The ACM KDD 2021.
• PC Chair, ASONAM 2021.
• Co-organizer, The First International Workshop on News Recommendation and Intelligence (MIND 2020), collocated with The WebConf 2021.
• PC Chair, ICWSM 2021 Data Challenge.
• Steering Committee, the First Workshop on Combating Online Hostile Posts in Regional Languages during Emergency Situation (CONSTRAINT), Collocated with AAAI 2021. [Proceedings]
• Organizer, Springer Social Network Analysis and Mining (SNAM) - Special Issue on Tackling COVID-19 Infodemic.
• Panelist, the First Global WHO Infodemiology Conference, July, 2020.
• Panelist, Online Safety Panel in ICWSM Data Challenge, June 8th, 2020
  
• Co-editor, Information Processing & Management Journal, Special Issue on Dis/Misinformation Mining from Social Media
  
• Co-organizer, ACM CIKM 2020, The 5th International Workshop on Mining Actionable Insights from Social Networks (MAISoN 2020)
  
• Publicity Chair, SIAM SDM Workshop on FEND 2019 (canceled)
  

Program Committee

• International Joint Conferences on Artificial Intelligence (IJCAI 2024) (Senior PC)
• 33rd ACM International Conference on Information and Knowledge Management (CIKM'24)
• The 2024 Conference on Empirical Methods in Natural Language Processing (EMNLP'24)
• The 17th ACM international Conference on Web Search and Data Mining (WSDM'24)
• The 2023 Conference on Empirical Methods in Natural Language Processing (EMNLP'23)
• Thirty-seventh Conference on Neural Information Processing Systems (NeurIPS 2023), Datasets and Benchmarks Track (Area Chair)
• The Thirty-Eighth AAAI Conference on Artificial Intelligence (AAAI'24) (Senior PC)
• The 13th International Joint Conference on Natural Language Processing and the 3rd Conference of the Asia-Pacific Chapter of the Association for Computational Linguistics (IJCNLP-AACL'2023)
• 32nd ACM International Conference on Information and Knowledge Management (CIKM'23)
• 23rd IEEE International Conference on Data Mining (ICDM'23)
• The 46th International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR' 23)
• The 61st Annual Meeting of the Association for Computational Linguistics (ACL'23)
• International Joint Conferences on Artificial Intelligence (IJCAI), 2023
• The 17th Conference of the European Chapter of the Association for Computational Linguistics (EACL 2023)
• SIAM International Conference on Data Mining (SDM), 2023, 2024
• TheWebConf, 2023
• 22nd IEEE International Conference on Data Mining (ICDM'22)
• The Thirty-Seventh AAAI Conference on Artificial Intelligence (AAAI'23) (Senior PC)
• The 16th ACM international Conference on Web Search and Data Mining (WSDM'23)
• The 2022 Conference on Empirical Methods in Natural Language Processing (EMNLP'22)
• The 2nd Conference of the Asia-Pacific Chapter of the Association for Computational Linguistics and the 12th International Joint Conference on Natural Language Processing (AACL-IJCNLP 2022)
• Thirty-sixth Conference on Neural Information Processing Systems (NeurIPS 2022), Datasets and Benchmarks Track
• The 9th IEEE International Conference on Data Science and Advanced Analytics (DSAA'22)
• 31st ACM International Conference on Information and Knowledge Management (CIKM'22)
• ACM SIGKDD Conference on Knowledge Discovery and Data Mining (KDD' 22)
• The 45th International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR'22)
• The 60th Annual Meeting of the Association for Computational Linguistics (ACL'22)
• SIAM International Conference on Data Mining (SDM'22)
• TheWebConf, 2022
• The Thirty-Sixth AAAI Conference on Artificial Intelligence (AAAI'22)
• The 15th ACM international Conference on Web Search and Data Mining (WSDM'22)
• The 2021 Conference on Empirical Methods in Natural Language Processing (EMNLP'21)
• 30th ACM International Conference on Information and Knowledge Management (CIKM'21)
• ACM Web Science Conference (WebSci'21)
• TheWebConf, 2021
• ACM SIGKDD Conference on Knowledge Discovery and Data Mining (KDD' 21)
• The 59th Annual Meeting of the Association for Computational Linguistics (ACL'21)
• The 43rd European Conference on Information Retrieval (ECIR'21)
• The Thirty-Fifth AAAI Conference on Artificial Intelligence (AAAI'21)
• SIAM International Conference on Data Mining (SDM), 2021
• ACM International Conference on Web Search and Data Mining (WSDM), 2021
• ICWSM International Workshop on Cyber Social Threats, 2020
• The Asia-Pacific Chapter of the Association for Computational Linguistics and the 9th International Joint Conference on Natural Language Processing (AACL-IJNLP), 2020
• The European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML-PKDD), 2020
• International AAAI Conference on Web and Social Media (ICWSM), 2020
• The Thirty-Fourth AAAI Conference on Artificial Intelligence (AAAI'20)
• 2019 IEEE International Conference on Cognitive Machine Intelligence (CogMI'19)
• 28th International Conference on Artificial Neural Networks (ICANN'19)
• SIAM SDM Workshop on FEND Publicity Chair, 2019
• The IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining (ASONAM'19)
• SIGIR workshop on Reducing Online Misinformation Exposure (ROME'19)
• International AAAI Conference on Web and Social Media (ICWSM), 2019
• IEEE International Conference on Big Data (BigData), 2018
• IEEE International Conference on Big Data (BigData), 2017
• IEEE International Conference on Big Data (BigData), 2016

Journal Reviewer

• Information and Management
• Frontiers in Public Health
• ACM Transactions on Database Systems (TODS)
• IEEE Intelligent Systems
• Applied Sciences
• Expert Systems With Applications
• Proceedings of the National Academy of Sciences of the United States of America (PNAS)
• Frontiers in Big Data
• Policy Sciences
• Concurrency and Computation: Practice and Experience
• Frontiers in Psychology
• ACM/IMS Transactions on Data Science
• Electronic Commerce Research and Applications
• Journal of Information Security and Applications
• Computer
• ACM Transactions on Knowledge Discovery from Data (TKDD)
• Knowledge and Information Systems (KAIS)
• ACM Computing Survey
• SAGE Open
• Transactions on Information Systems
• Transactions on Asian and Low-Resource Language Information Processing
• Springer Nature Applied Science (SNAS)
• IEEE Transactions on Knowledge and Data Engineering (TKDE)
• ACM Transactions on Intelligent Systems and Technology (TIST)
• Neurocomputing (NEUCOM)
• IEEE Transactions on Neural Networks and Learning Systems (TNNLS)
• Natural Language Engineering (NLG)
• Computers & Security (COSE)
• World Wide Web Journal (WWWJ)
• Journal of Computational Science (JOCS)

Conference External Reviewer

• IEEE ICDM 2021
• TheWebConf, 2020
• ACM SIGKDD Conference on Knowledge Discovery and Data Mining, 2019, 2020
• TheWebConf, 2019
• ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR), 2018
• International AAAI Conference on Wen and Social Media (ICWSM), 2018
• International AAAI Conference on Wen and Social Media (ICWSM), 2016
• Pacific Asia Knowledge Discovery and Data Mining (PAKDD), 2018
• AAAI Conference on Artificial Intelligence (AAAI), 2018
• ACM International Conference on Conference on Information and Knowledge Management (CIKM), 2017
• ACM International Conference on Web Search and Data Mining (WSDM), 2017
• IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining (ASONAM), 2018
• IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining (ASONAM), 2017
• IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining (ASONAM), 2016
• ACM Conference on Recommender Systems (RecSys), 2016
• International Joint Conferences on Artificial Intelligence (IJCAI), 2016