I had an on campus interview with American Express at my university. The day consisted of two 45 minute interviews with current AMEX professionals. Interview was relatively relaxed. Both interviewers were friendly and the entire interview felt much more like a conversation than an interview. Both interviewers spent the first 10 minutes making small talk before the questions began.
I applied online. The process took 2 months. I interviewed at American Express (London, England) in Feb 2012
Interview
An online application form, followed by online numerical and verbal reasoning tests (both of which were fairly straight forward), followed by a phone interview and an assessment centre. Assessment centre consisted of 2/3 interviews, a group exercise and a case study with a presentation. The day was well organised and it seemed like the organisation had a good working culture.
Interview questions [1]
Question 1
What makes American Express' businesses model unique?