This paper explains the role and the main objectives of the GSE Forest Monitoring (GSE FM) Service Portfolio Evolution. This task supports the cardinal requirements of sustainability of the GMES (Global Monitoring for Environment and Security) services. In order to satisfy the needs of the stakeholder the requests for better and more complete information on environment and security the GMES services must continuously improved. The Service Portfolio Evolution is one of the key inputs for improved service provision. Throughout the entire services of the GSE FM Service Portfolio the interactive involvement within the process of production (in-situ measurements, data pre-processing, data classification, product accuracy assessment etc.) is the most cost and time efficient factor and is therefore be treated with high priority to research activities. The continuous identification of new R&D therefore supports the sustainability of the GMES services and establishes common standards for all Service Providers and users.