"University College Dublin (UCD) proposes a new Postdoctoral training and career development Fellowship Programme, ENERGY21. This programme will maximise the career development of the next generation of researchers in a range of energy-related fields that promise new and exciting opportunities. The programme is characterised by transparency and openness in selecting excellent researchers, granting the fellows freedom to choose their research project, their outgoing host organisation and their Principal Investigator (PI) mentor. Guided by a personal career development plan, a one -to-one mentorship programme and reintegration opportunities, ENERGY21 provides a comprehensive programme of support for the fellows to embark on a lifetime scientific career, one that accommodates changing market needs and contributes to Europe’s competitiveness. The programme will enable a significant number of researchers to be trained to the highest international standards in a research field critical to the energy sector in Europe. This represents a material expansion in capacity in the field at a time of a crippling shortage of suitably qualified personnel. ENERGY21 will enhance and improve the internationalisation of the European energy research and development sector, support knowledge transfer, and strengthen partnerships between academic research and the private sector. ENERGY21 will offer 21 prestigious Fellowships for incoming (15) and reintegrating (6) researchers across the three calls. All Fellowships will include an outgoing phase."