I applied in-person. The process took 2 months. I interviewed at The Nature Conservancy (Arlington, VA) in Jan 2012
Interview
First job answered an ad in the newspaper. Subsequent jobs applied internally via the HR intranet. Usually 2 to 3 interviews until you get the job offer. They do check on your references, and if you are in the company they give priority to internal employees. They have the basic interview questions.
Interview questions [1]
Question 1
Why do you want this job? How long have you been at your position? Do you have skills that match the position?