Session Co-Organizer, “Water Quality Stewardship in Pursuit of Unconventional Oil and Natural Gas Reservoirs,“ Division of Environmental Chemistry, Centennial Celebration, American Chemical Society 247th National Meeting, March 16-20th, 2014, Dallas Texas. Chair, External Advisory Board, University of Arizona Superfund Research Program, Sept. 2012 to present. Session Chair, “Uranium Biogeochemistry: Transformations and Applications,” International Workshop, Monte Veritá, Ascona, Switzerland, March 11-16, 2012. University of Michigan Team Participant, University of Michigan and Bechtel Partner Session, Bechtel Corporation Office, Frederick, MD, February 21, 2012. Member, External Advisory Board, University of Arizona Superfund Research Program, Sept. 2011 to present. Member, MI Green Chemistry and Engineering Conference Steering Committee, 2011. Member, NSF Proposal Review Panel, Environment Health and Safety of Nanotechnology, December 16-17, 2010, Washington D.C. Invited Panel Member, American Association for the Advancement of Science, Proposal Reviews for KACST (King Abdulaziz City for Science and Technology) Program, Winter 2010 Competition. Invited Participant, Working Group on In Situ Biogeochemical Transformations,” Dallas, Texas at USEPA Region 6 headquarters, Nov. 5, 2009. Invited Panel Member for DOE Office of Biological and Environmental Research, Merit Review of the Scientific Focus Area (SFA) Science Plan in the Environmental Remediation Sciences Program (ERSP) focus area at Argonne National Laboratory (ANL), Review of Plan: April-May, 2009, ANL Review visit: June 10th – 11th, 2009. Invited Panel Member, American Association for the Advancement of Science, Proposal Reviews for KACST (King Abdulaziz City for Science and Technology) program, Winter 2009 Competition. Conference Organizer and Session Chair, “Metal and Metalloid Speciation and Adsorption in Honor of James O. Leckie,” 237th Amer. Chem. Soc. National Meeting, Salt Lake City, March 22-26, 2009.