Aplication through the website - just CV and cover letter. They are mostly looking for people with international background or French-speaking. After an interview via telephone with HR recruiter (simple questions, motivation etc), you have a meeting with your future supervisor. Again - depends who are you going to work with. My boss was half french so he imediatly checked my language skills and some accounting basis with financial analysis. But also he made brief presentation of the group and objectives of my future division. After 3 days I received a telephone with a confirmation and in next week I started an internship.