National Water Center, Groundwater Theme Leader, 2018 Summer Institute.
ASCE Kansas Section, President, 2017-2018.
CUAHSI (Consortium of Universities for the Advancement of Hydrologic Sciences, Inc.), University Representative, 2004-2018.
UCOWR (University Council On Water Resources), University member, 2005-2018.
American Society of Civil Engineers, member, 1983-present, Fellow 2017-present.
American Geophysical Union, Groundwater Technical Committee (past member), member, 1998-present.
IAHS (International Association of Hydrologic Scientists), member, 2010-present.
European Geophysical Union, member, 2011-2014, 2018-2019.
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