Purpose: PhD graduates are entering an increasing range of careers, but past research has highlighted a lack of preparation for these careers. This study aims to explore the reflections of PhD graduates from science and humanities and social science disciplines regarding support for career development (CD) during their study. Design/methodology/approach: The authors used an explanatory sequential mixed-methods design and collected 136 survey responses and interviewed 21 PhD graduates from two US and one New Zealand universities to investigate their career readiness. Using the lens of Cognitive Information Processing theory, the authors explored the development of self-knowledge and career options-knowledge, and how support at the macro (institutional), meso (departmental) and micro (supervisors) levels influenced CD. Findings: During doctoral study, there was very poor engagement with CD activities. Graduates displayed limited self-knowledge and poor knowledge about career options. Graduates reported drawing mainly on their departments and supervisors for career guidance. Although there were pockets of good practice, some departments were perceived as promoting academia as the only successful outcome, neglecting to support other possible pathways. Some graduates reported excellent supervisor support for CD, but others described disinterest or a damaging response if students said they were not wanting to pursue academia. Originality/value: The enabling aspects for developing self- and options-knowledge are collated into a conceptual model, which identifies key factors at institutional, departmental and supervisor levels, as well as for PhD students themselves.