Annex D. Classification and definition of occupations

The following classification resulted from the 2022 OECD/IDB Survey on Public Service Leadership and Capability in Central/Federal Governments which also used the same definitions as in the 2022 OECD/BID Survey on Composition of the Workforce in Central/Federal governments. Such classification defines the four main hierarchical levels of occupations. These definitions are broadly based on the International Standard Classification of Occupations (ISCO) maintained by the International Labour Organisation, and full definitions are available via the following link: The classification and the definition of the occupations are an adaptation of the International Standard Classification of Occupations (ISCO-08) developed by the International Labour Organization (ILO). The reason for the adaptation is that not all countries follow the ISCO model to classify their occupations in government, as the occupations included at the national level may differ due to specific legal and administrative frameworks.

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