Professional Service 
2015-present
Communications Committee, American Ornithological Society
2010-present
Committee on Birds of North America Liason, American Ornithological Society
2009-present
Working Group (Chair), Arctos Collaborative Collection Management Solution
2005-present
Information Technology Advisory Committee, Berkeley Natural History Museums
1998-present
Committee on Classification and Nomenclature of North and Middle American Birds (co-Chair), American Ornithologists’ Union
1997-present
Committee on Bird Collections, American Ornithologists' Union
2012-2015
Board of Directors, Cooper Ornithological Society
2012-2015
Web Site Committee (Chair), Cooper Ornithological Society
2005-2015
Editorial Board, University of California Publications in Zoology
2009-2013
Committee for Nominations of Fellows and Elective Members, American Ornithologists’ Union
2009-2010
Committee for Selection of Travel Award Participants to International Ornithology Congress, Brazil, Cooper Ornithological Society representative
2004-2008
Special Affairs Committee on Early Professionals (Chair), American Ornithologists' Union
2002-2008
Special Affairs Committee on Website, American Ornithologists' Union
2004-2005
Information Technology Strategic Planning Committee, Berkeley Natural History Museums
2003-2004
Special Affairs Committee on Awards, American Ornithologists’ Union
2003-2004
Committee on Memorial Resolutions (memorial for Dr. Ned K. Johnson), UC Berkeley
2001
Painton Award Committee, Cooper Ornithological Society
1994-2000
Student Awards Committee (Chair, 1996-2000), American Ornithologists' Union
1997-1998
Student Awards Committee, North American Ornithological Conference