Editor-in-chief, The Electronic Journal of Linear Algebra, 2010–2019 Co-chair, Digital Pillar and School of Computing Plan, 2020-2
Associate Editor, Linear Algebra and its Applications, 2000–2022
Associate Editor, Linear and Multilinear Algebra, 2000–2024
Editor-in-chief, IMAGE: Bulletin of the International Linear Algebra Society, 2003–2006
VP of International Linear Algebra Society (ILAS), 2011–2014
Editor of Linear Algebra and its Applications special Coimbra issue, 2004
Editor of The Electronic Journal of Linear Algebra special BIRS issue, 2004
Editor of Linear Algebra and its Applications special Postech issue, 2002
Editor of Linear Algebra and its Applications special Chemnitz issue, 1998
Grant refereeing for National Science Foundation, 1994, 1996, 1998, 2003, 2015
Co-Chair of the Wyoming Resource Allocation Panel, 2011_2019
Chair of committee that developed UW’s Cyberinfrastructure Plan, 2010–2011