Editor-in-chief, Current Protocols in Cytometry, 1995-Associate Editor, Histochemica et Cytobiologica, 1998-Editorial Board, Communications in Clinical Cytometry, 1994-Reviewer for a variety of journals (approximately 15 journals)Member, NSF Advisory Panel, Major Research Institution, 1996Member, NSF Advisory Panel, Major Research Institution, 1997Member, NSF Advisory Panel, Major Research Institution, 1998Member, NSF Advisory Panel, Major Research Institution, 1999Member, NIH Shared Instrumentation Panel, Research Resources, Cytometry Instrumentation, 1994, 1996, 1999, 2000, 2001, 2003,Member, NIH Shared Instrumentation Panel, Research Resources, Microscopy, 2001Member, NSF Advisory Panel, ESI Division, 2001Member, NIH Shared Instrumentation Panel, Research Resources, Microscopy, Sept 2003Member, NIH Study Section, Microscopy & Imaging, Study Section, July 2004Member, NIH Shared Instrumentation Panel, Research Resources, Cytometry, May, 2004Member, NIH Shared Instrumentation Panel, Research Resources, Microscopy, Sept 2004Member, NIH Microscopy & Imaging Study Section, (Regular member) November 2004Member, NIH Special Study Section COBRE - February, 2005Member, NIH Special Study Section, March 2006