VLDB: 2011, 2007, 2001, 1994.
SIGMOD: 2004.
PODS: 2008, 2005, 1995.
ICDT: 2013, 1995.
EDBT: 2008.
ICDE: 2007.
CIKM: 2013.
SUM: 2010-2015, 2007.
FOIKS: 2012, 2010.
TIME: 2010, 2009, 2006, 2005 (co-chair), 2001, 2000, 1999, 1998, 1996.
DBRank: 2007-2010.
POLICY: 2001-2004.
SSTD: 2003, 2001.