Hi Forian,
Software, but also has managed multiple projects with a budget exceeding 500,000 Euros. I am fully aware that Free Software is not about price, but those kinds of projects are also not all that common
The experience from multiple projects need not necessarily be in free software, they can be in general, from what I understand. A stronger candidate would have this experience in free software projects, but I'm not sure how many qualified applicants there would be in Europe it.
But if we look a bit broader; the Document Foundation, Apache Foundation, Eclipse Foundation, Linux Foundation and so on, these all have budgets in the million-USD category, some more than others. So I think someone from some of the bigger foundations might well fit the bill.