Online networks are a highly topical issue for continuous learning and also for management policy development within the cultural heritage sector. In our project, a well-known framework for community building was adopted and tested in practice: firstly, we conducted a needs assessment and planned usability and sociability practices in parallel. We explored how to succeed in building an online expert network, relying on careful needs assessment, openness, a participatory approach and identifying lead users. Our case highlights the significance of data safety, encouraging networks to rely on platforms where the user community manages its own knowledge base. We believe our case has important implications for cultural heritage professionals internationally, but it is also insightful for other expert groups and professional sectors.