Aik Hoe Lim is Director of the Trade and Environment Division at the World Trade Organization and leads its work on environmental sustainability, climate change and trade, as well as on technical regulations and standards under the Agreement on Technical Barriers to Trade. In this role, he has strengthened WTO's role on environmental sustainability, as well as its partnership with the United Nations Environment Program (UNEP), United Nations Framework Convention on Climate Change (UNFCCC), Basel, Stockholm and Rotterdam Conventions (BSR), as well as the World Bank, UNCTAD, OECD and the WEF, amongst other international organizations. 

He led the establishment of WTO's Trade and Environment Week, which is now an annual flagship event for the organization. He leads WTO's work on trade and climate change and formulated/coordinated WTO's strategy for engagement and participation at the UN Climate Change Conferences. He joined the WTO in 1999 and served in the External Relations Division, the Director-General's Cabinet and the Trade in Services Division. He was previously Counsellor to two WTO Director-Generals, Adviser to the Director General’s Consultative Group, and Secretary to WTO committees, working groups and negotiating bodies on services trade and domestic regulation. He represents the WTO in the UN Environmental Management Group and the UN Framework Convention on Climate Change and is a member of the Advisory Board of the UNEP Global Environmental Outlook.  

He is a Fellow of the Royal Society of Arts, UK.  Some of his publications include contributions to the "Research Handbook on Climate Change and Trade Law" (2017); "Win-Win: How International Trade Can Help Meet the Sustainable Development Goals" (2017); and an edited volume on "WTO Domestic Regulation and Services Trade" (2014).