Principal occupations difficult to fill per sub-sector. Source: REN Alliance survey .
|Wind energy||Project developers, service technicians, data analysts, electrical, computer, mechanical and construction engineers|
|Solar energy||PV and solar thermal system installers and maintainers, building inspectors|
|Hydropower||Electrical and operations & maintenance engineers, technicians, trades persons, sustainability specialists|
|Geothermal||Trainers, geothermal engineers|
|Bioenergy||R&D and design engineers, service technicians, trainers|
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