The calls for independent experts for Horizon 2020 have been published (http://eur-lex.europa.eu/JOHtml.do?uri=OJ:C:2013:342:SOM:EN:HTML).
These 'calls addressed to individuals for the establishment of a database of prospective independent experts and to organisations such as research agencies, research institutions, universities, standardisation organisations, civil society organisations or enterprises', have been designed to encourage and attract experts with the widest range of profiles needed for Horizon 2020. This includes cross-cutting aspects such as: innovation; SMEs; dissemination, knowledge transfer and intellectual property rights; social and economic sciences and humanities; responsible research and innovation; research career development, doctoral training, and skills; sustainable development; and international cooperation. The resulting expert database will be used among other things for selecting expert evaluators and reviewers.
The text of the calls is available at: http://ec.europa.eu/research/participants/data/support/h2020_call-individual_experts_oj_c342_03.pdf.
More information is available here: http://ec.europa.eu/research/participants/portal4/desktop/en/experts/index.html