In prior positions, Diallo has served as Chief Administrator for the DC 37 Education Fund, managing workforce strategy and training for the nation's largest municipal public-sector labor union; served as Senior Director of Sustainability Education at the NYC Department of Education to support the nation’s largest school system on structuring public/private partnerships with Fortune 500 corporations to improve career and technical education; From 2011 - 2013, Diallo was appointed as a North American Civil Society Representative for the United Nations Environment Programme (UNEP), where he presented at ministerial-level meetings on the Post-2015 Agenda and sustainable development goals in Europe and Africa.