Small-to-medium ports are characterised with inefficient, ineffective and resource intensive information sharing, which is not supporting their complex and dynamic environment. This creates challenges both for optimizing the internal planning of the activities at the port according to the demand, and for stronger supply chain integration with the external actors. This paper focuses on identifying the needs and criteria for an information sharing system, and proposes an approach for sharing operational data in port systems for improved supply chain integration, in the context of logistic engineering. The proposed approach has the potential to alleviate some of the problems when operating in a dynamic demand environment.