General Co-Chair, ACM SIGMOD 2012 (2012) .

Guest Editor, IEEE Transactions on Knowledge and Data Engineering, Special Issue on "Keyword Search on Structured Data" (2011).

Guest Editor, Proceedings of the VLDB Endowment (2010).

Steering Committee Member: KEYS (Keyword Search on Structured and Semi-Structured Data) workshop, 2009.

Program Committee Co-Chair: First International Workshop on Keyword Search on Structured Data (KEYS), collocated with SIGMOD, 2009 - present.

Publicity and Proceedings Chair: ACM SIGMOD-SIGACT-SIGART Symposium on Principles of Database Systems (PODS), 2009.


Program Committee Member

2012:
- ACM SIGMOD International Conference on Management of Data (SIGMOD)
- International Conference on Data Engineering (ICDE)
- International Conference on Extending Database Technology (EDBT)
- International Conference on Database Systems for Advanced Applications (DASFAA)
- International Workshop on Keyword Search on Structured Data (KEYS) (co-located with SIGMOD).

2011:
- ACM SIGMOD International Conference on Management of Data (SIGMOD)
- International World Wide Web Conference (WWW)
- The Pacific-Asia Conference on Knowledge Discovery and Data Mining (PAKDD)
- International Conference on Advanced Data Mining and Applications (ADMA)
- International Workshop on Information Integration on the Web (IIWeb) (co-located with WWW)
- International Workshop on Ranking in Databases (DBRank) (co-located with VLDB)

2010:
- ACM SIGMOD International Conference on Management of Data (SIGMOD)
- International World Wide Web Conference (WWW)
- ACM Conference on Information and Knowledge Management (CIKM)
- Web and Databases (WebDB) (collocated with SIGMOD)
- International Workshop on Massive Data Analytics over the Cloud (collocated with WWW)
- Sixth International XML Database Symposium (XSym) (collocated with VLDB)
- International Workshop on New Trends In Information Integration (collocated with ICDE)

2009:
- International Conference on Very Large Data Bases (VLDB)
- International Conference on Data Engineering (ICDE)
- ACM Conference on Information and Knowledge Management (CIKM)
- International Conference on Database Systems for Advanced Applications (DASFAA)
- The Joint International Conferences on Asia-PacificWeb Conference (APWeb) andWeb- Age Information Management (WAIM)
- ACM International Workshop on Web Information and Data Management (WIDM)

2008:
- International Conference on Very Large Data Bases (VLDB)
- AAAI Conference on Artificial Intelligence (AAAI)
- ACM Conference on Information and Knowledge Management (CIKM)
- International Conference on Database and Expert Systems Applications (DEXA)
- International Workshop on New Trends in Information Integration (collocated with VLDB)
- ACM International Workshop on Web Information and Data Management (WIDM)

2007:
- International Conference on Database and Expert Systems Applications (DEXA)
- Workshop on Database Management and Application over Networks (DBMAN).

2006:
- International XML Database Symposium (XSym, collocated with VLDB)
- International Conference on Image and Video Retrieval (CIVR)
- International Workshop on XML, Web, and Internet Contents Technologies (XWICT)

2005:
- International XML Database Symposium (XSym, collocated with VLDB)

Journal Reviewer