The challenge this project proposal faces is how to support social interactions of people in learning networks to find the most relevant expertise to foster informal learning. This applies especially to a new learner, who may have a question like "who should I ask?”, in the attempt to get information about the suitable people and call them for a help. There is a need for matching the right people based on their interests for effective knowledge sharing, exchange of ideas, and future collaboration. This project will develop a matching service: Social Support System (SoSuSy) to find other people in learning networks. Such a tool would assist learners in deciding whom to turn to for specific questions or requests for support.