Current ancillary activities:

• Adviser, Delegation of the Deep-Ocean Stewardship Initiative (DOSI) to the Council meetings of the International Seabed Authority, Kingston Jamaica (since 28th session, parts II - July 2023)
• Co-convener, Task Force on Earth System Law, Earth System Governance Project (since August 2017)

Peer review:

• Canadian Yearbook of International Law
• Earth System Governance Journal
• Global Policy 
• International Journal of Marine and Coastal Law
• Leiden Journal of International Law
• Marine Policy
• Review of European, Comparative & International Environmental Law (RECIEL)

Past positions:

• International Review Panel, 2022 Toronto Conference on Earth System Governance
• Member of the Organizing Committee of the NILOS Moot Court Competition (October 2018 - August 2019)
• Co-Coordinator, Public International Law Luncheons (February 2017 - December 2018)
• Observer, Dutch delegation to the Third and Fourth meetings of the BBNJ Preparatory Committee, and to the First meeting of the BBNJ Intergovernment conference, UN Headquarters, New York, USA (March 2017, July 2017, and September 2018)
• Coach of the team from Utrecht University participating in the Telders International Law Moot Court Competition (October 2016-May 2017)