PurposeAs the youngest generation – Generation Z (Gen Z) – enters the workplace, there is a growing interest in this cohort's career needs and expectations. This paper explores the under-researched topic of Gen Z project management (Gen Z PM) professionals. In addition to shedding light on the factors that positively affect Gen Z PM professionals' early career-development phase, this research aims to identify specific organization-led practices that can foster sustainable early PM careers and so achieve greater workforce sustainability.Design/methodology/approachThrough the lens of the resource-based view (RBV), Gen Z PM professionals are considered critical resources that can help ensure workforce sustainability in project-based organizations (PBOs). Semi-structured in-depth interviews were conducted with 25 Gen Z PM professionals in Australia to explore the professionals' early career experiences and the organizational-support initiatives that facilitate positive experiences. The results were analyzed using thematic analysis.FindingsThe results revealed that most Gen Z PMs experienced many challenges and a lack of support during their early career phase: Gen Z value (1) mentoring, (2) time for training and development, (3) showing support and guidance, (4) understand skill-gaps and (5) reasonable workloads. Through catering to these needs, PBOs can ensure better career sustainability for their young Gen Z talent and, therefore, greater workforce sustainability for the project profession.Originality/valueAccording to the career sustainability lens, PBOs play a significant role in ensuring that their valuable young PM talent are supported and retained in the profession. This research sheds light on what Gen Z PM professionals value in their early careers, which guided recommendations to better support this new generation of project professionals.