I found LinkedIn to be very effective in my searches. You can sort by the different locations within the country and I found a large number of candidates. With my requirements, looking for public company >1,000 employees, it was better to x-ray LI than to use the advanced search as those aren't searchable parameters. Also, I found that I was able to search Monster's resume database for resumes in the netherlands, even though our sub is only for the US. Good luck, let me know if you want some more info.