| ISTE | 2006 - present | Member | | Dr Siu Siu Felix Lai Chung |
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| IT Committee, College of Dental Surgeons of Hong Kong | 2004-now | Member | | Dr Zee Zee Kwan Yat |
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| IT Committee, The College of Dental Surgeons of Hong Kong | |
| IT in Education Symposium | 03/2009 | Track Chair | | | 2006-2007, 2011 | Organising Committee Member | | |
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| IT Subcommittee, HKCP | |
| Italian Art Society | |
| Italian Chamber of Commerce in Hong Kong and Macau | |
| Italian Government, National Agency for the Evaluation of Universities and Research Institutes (ANVUR) | 09/2012 - present | Reviewer, Research Grants | | |
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| Italian Ministry of Foreign Affairs | | Legal Advisor and Delegate at UNCITRAL | | |
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| Italian Society of Gastroenterology | 1993- | Corresponding Member | | |
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| ITI international team for Implantology | |
| ITS World Congress Technical Paper Committee | |
| IUCN (World Conservation Union) Specialist Grouper for Groupers and Wrasses | |
| IUFRO (INTERNATIONAL UNION OF FOREST RESEARCH ORGANIZATIONS) | 01/2007 - 01/2009 | Chair, IALE-IUFRO Working Group, Forest Landscape Ecology | | | 10/2006 - present | Member and European Coordinator, IUFRO Landscape Ecology Working Group | | | 10/2002 - present | Member, IUFRO Urban Forestry Working Group | | |
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| IUFRO-Urban Forestry Unit | 09/2023-present | Coordinator | | |
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| IUPAC | 04/2010-present | Affiliate Member | | |
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| IUPAC Division of Organic & Biomolecular Chemistry, Subcommittee on Organic Synthesis | |
| IUPAC Task Group for "Strategic Planning for a New East Asian Network for Organic Chemistry" | 02/2006-present | Project Member | | |
|
| IUPHAR International Core Concepts of Pharmacology Education Project Expert Group | 07/2022 - present | Member | | Dr Liang Liang Willmann |
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| IWA | 03/2013-now | member and specialist group member | | |
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