Purpose: Public service organizations (PSOs) face a critical dilemma: how to generate more value for society but with a much-reduced resource base. The article advances the strategy axis of entrepreneurial orientation (EO) research by examining EO and proactive market orientation (PMO) as joint-strategic approaches to this end, and how the characteristics of public managers may moderate the paths to value creation. Design/methodology/approach: The article draws on a unique survey-based dataset developed from Brazilian PSOs and employs structural equation modelling for hypotheses testing. Post-hoc analysis, by way of analysis of variance, demonstrates the joint impact of the two strategic approaches on public service performance level. Findings: Entrepreneurial and PMOs are revealed as routes to enhanced service performance, but managers’ domain expertise negatively moderates these relationships. Post-hoc analysis reveals how organizations displaying higher levels of both orientations realize superior performance, relative to those favouring either/or. Originality/value: The study contributes new evidence for EO model specificity by examining a narrowly bounded sample of PSOs; addresses the neglect of other outcome variables beyond traditional performance, showing the value of EO for society and offers new insights to the managerial conditions that moderate the positive synergies between EO, PMO and service performance.