Over the past decade, organisations have started to deploy a younger workforce into management and leadership positions, reflecting not only demographic shifts but also efforts to promote sustainable management practices and innovative decision-making. This has led to an increase in the number of older workers reporting to younger managers. Another factor influencing this situation lies on the same workplace demographics and the drive for efficient, sustainable organisational operations. In this regard, efficient operation in the situation when an older workforce reports to younger supervisors has become a challenge and a critical workplace issue. The present paper aims at determining and detailing the challenges arising from this age-difference factor in the context of sustainable management. For these purposes, a quantitative study was designed and conducted through Google Forms, where 20 companies in Austria with younger supervisors, and a total of 1625 employees across a range of different sectors, participated in the study. The authors found that the greater the age-difference, the more likely a negative attitude towards younger supervisors prevailed. The majority of respondents who were not satisfied with having a younger supervisor doubted that the supervisor knew more (60.43%), felt that the supervisor micromanaged (464), became defensive (42.85%), preferred a younger workforce (38.90%), did not give enough guidance (34.29%), did not know how to make things better (325), did not know how to use modern technology better (20%), and had fixed stereotype views about the older workforce (17.58%). Similarly, older subordinates (62.92%) were very sensitive to the use of the word ‘slow’ by a supervisor, while 58.30% were very sensitive of the word ‘old-timer’ from a younger supervisor, were sensitive to the thinking that they are nearing the end of their working lives (39.85%) and to the thinking that they needed less attention (32.46%). The paper concludes that the deciding factor influencing the results of the study is not necessarily age but is instead the experience of having a younger supervisor. The novelty of this study lies in its age-inverse supervisory experiences in the mode that improve both, the company at the organisational position and the workforce at the individual position.