Higher education learning is increasingly enacted in digital environments and doctoral education is no exception. Scholars -- supervisors and PhD candidates -- actively create their own digital profiles, and their research is often disseminated via social media in tandem with the traditional publication of journals and books. Online learning behaviours, social media and doctoral education are complex, and, when considered together, present distinct challenges. This paper explores the work and practices of digital academics using social media through a case study of an academic blog, "DoctoralWriting." We use statistical data from the blog to map evolving pedagogic practices and forms of doctoral writing support and engagement. This analysis reveals horizontalised networks of co-creating consumers and producers who interact on social media platforms in ways that signal new transnational networks of learning and teaching. This paper contributes to our understanding of academic engagement with social media in contemporary doctoral education, particularly doctoral writing.