Editor, Annals of the Association of American Geographers (Methods, Models, and GIS Section) (2006-present).
Book series editor, SAGE Advances in Geographic Information Science and Technology Series (2009-present).
General Chair, GIScience 2012 International Conference.
President, International Association of Chinese Professionals in Geographic Information Sciences (CPGIS) (2015).
Associate Editor, Travel Behaviour and Society (2013-present); Geographical Analysis (2003-2012).
Editorial boards, Journal of Transport Geography (2008-present); Applied Geography (2014-present); Geographical Analysis (2000-2002; 2012-present); Gender, Place and Culture (2003-2006); The Professional Geographer (2005-2010).
Charter Member, Community Influences on Health Behavior Study Section, Center for Scientific Review, National Institutes of Health (NIH) (2010-present).
Advisory panelist or reviewer of grant proposals for 14 National Science Foundation programs, National Institutes of Health, European Research Council, Natural Sciences and Engineering Research Council of Canada, Australian Research Council, Austrian Science Fund, Research Foundation of Flanders, Royal Geographical Society (U.K.), Research Grants Council of Hong Kong, and Swiss National Science Foundation (1995-present).
National Councillor, Association of American Geographers (2005-2008).
Member, Board of Directors, University Consortium for Geographic Information Science (UCGIS) (2004-2006).
Chair, Health and Medical Geography Specialy Group, Association of American Geographers (2014-15).
Chair, GIS Specialty Group, Association of American Geographers (2005-2006).
