• International Maritime Organization (IMO), Marine Environment Protection Committee (MEPC) & Sub-Committee on Pollution Prevention and Response (PPR), London, UK, since 2008.

• Baltic Marine Environment Protection Commission (HELCOM), Helsinki, Finland, 2021-2023.

• Council of the European Union, Shipping Working Party & Working Party on the Environment as well as Committee for the implementation of EU directive on sulphur content in marine fuels & EU Ship Recycling Regulation Committee, Brussels, Belgium, since 2011.