Mainly UK based jobs within the environmental industry
Global jobs, internships, volunteering opportunities. Also lots of great training resources!
General job board for charities in all industries - filter by industry or search with key words like "animals" and "wildlife"
The British and Irish Associate of Zoos and Aquariums jobs board, for all registered zoos in the UK.
Environmental jobs in the US
Environmental jobs in Australia!
Each January/February Operation Wallacea hire big teams of seasonal staff to work on research projects all over the world. This is how I got started working for Opwall! They need staff in logistics, research, management, lecturing, and diving.