The vast majority of UK civil and public servants have been developed within their service and professional sectors and there is frequently very little movement in terms of their employment into other service areas. This means that many of our current leaders have limited experiences in services and organisations other than their 'own'. This paper focuses on a new graduate programme for the training and development of public leaders of the future in Wales. In keeping with the spirit of the Well Being of Future Generations Act 2015 and the 'One Welsh Public Service' values and behaviours, this programme has been set up as a leadership and development programme for civil and public servants of the future exposing them to a range of sectors and services. The intention is that through these experiences, future leaders will approach problems from a multi-service perspective, will be better networked and ready to deal with complexity. Areas of good practice will be highlighted together with some of the challenges of developing leaders in this way.