This chapter argues that Early Career Researchers (ECRs) can contribute to the IPCC in two major ways. First, ECRs can contribute unique skills and competences to the assessment process. Second, ECRs can share the workload with senior researchers and thus enhance the quality of the assessment. By reviewing the IPCC’s Scholarship Programme and the role of Chapter Scientists, this chapter explores the potentials and challenges of introducing ECRs into the IPCC, and for the Panel to engage in capacity building to enhance the quality of the assessment. The review shows how the organisational setup of the Scholarship Programme and the Chapter Scientist role allows the IPCC to informally engage in capacity building without diverting from its mandate that does not include capacity building. Even so, ECRs remains an untapped source of expertise that, through active and strategic work, can contribute to the future development of the IPCC.