The Public Health Service (PHS) in Germany has had difficulties in recruiting enough qualified staff for years, but there is limited research on what factors drive decisions to (not) join the PHS workforce. We explored reasons for this perceived (lack of) attractiveness. We conducted two cross-sectional surveys among medical students (MS), public health students and students from other PHS-relevant fields (PH&ONM) in Germany before (2019/2020) and during the COVID-19 pandemic (2021). Both waves surveyed self-reported reasons for why students did (not) consider working in the PHS as attractive and how this could be improved, using open-question items. Qualitative and quantitative content analyses were conducted according to Mayring. In total, 948 MS and 445 PH&ONM provided valid written responses. Reasons for considering the PHS as attractive were, among others, the perception of a good work-life balance, high impact, population health focus, and generally interesting occupations. Suggestions to increase attractiveness included reducing bureaucracy, modernization/digitalization, and more acknowledgement of non-medical professionals. Among MS, reasons against were too little clinical/patient-related activities, low salary, and occupations regarded as boring. Our findings indicate areas for improvement for image, working conditions in, and institutional structures of the PHS in Germany to increase its attractiveness as an employer among young professionals.