Lead Author for the Intergovernmental Panel on Climate Change (IPCC) 2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories; UN-ERT, Greenhouse Gases Inventory Expert Reviewer Team of UNFCCC. Reviewer with UNFCCC various reports; Climate Change Focal Point in Union for Mediterranean (UfM); National representative to the Climate Change Expert Group (CCEG) of UfM. Roster of Experts of UNFCCC; Roster of Experts of IPCC, Working group III of GEF GHG Methodology; National NAMA Approver with UNFCCC; National Council for Climate Change; Advisory Board of Climate Change mitigation and resilient Project, UNIDO; Egypt's Fourth National Communication (NC4Egypt) Project Manager; Low Emission Capacity Building (LECB) Project Manager, Egypt's First Biennial Update Report (BUR1) Project Steering Committee; Egyptian Designated National Authority (DNA) for Clean Development Mechanism.