MareGraph aims to bring together and collaborate with highly diverse national and regional Research Infrastructure (RIs) in Europe. To maximize the impact of MareGraph and its results, the project implements effective communication, dissemination and knowledge transfer methodology and strategies. Having a defined process and methodology for organizational interoperability is crucial as it ensures seamless communication, data exchange, and collaboration between different departments, systems, and organizations, thereby enhancing efficiency, reducing errors, and enabling effective decision-making. This document stems from the ICEG process and methodology, which in turn was the English translation of the OSLO process and methodology. The process focuses on the harmonization and alignment of initiatives with the goal of developing ontologies across borders in the EU.