International OCD Foundation, HD Conference planning team: 2021 to present.
Mental Health Association of San Francisco, International Hoarding and Cluttering Conference planning committee: 2012 to present
Western Mass Hoarding Disorder Resource Network (formerly the Western Mass Hoarding Task Force): 2007 to present
Massachusetts Statewide Steering Committee on Hoarding: 2014 to present
Lee is a member of The Hampshire County Citizens Site Board for the Department of Mental Health in Western Massachusetts: 2017 to present. He was the board president from 2018-2021.