With digital systems permeating the healthcare sector, the healthcare workforce (clinical and administrative) need insight in biomedical health informatics (BMHI) to some degree. This study shows how novices in BMHI had to knock hard on several doors to find and become part of a community of practice to gain such expertise within BMHI. While it may be generally understood that gaining access to expertise is important, our findings suggest that more attention is needed to how such access is gained. The study exemplifies that the needed skills and competencies are difficult to identify in the individual projects and are highly situated – not least because it requires access to various experts in communities of practices. Therefore, there is a continued need to reframe the necessary education and training. Knowing when to knock on doors, which doors to knock on, and keeping doors open is central to becoming – and keep on being – a part of a community of practice centring on health information technology and BMHI.