The interview process for Essilor is quite extensive and very thorough. I applied the end of August online and was contacted by a recruiter mid September. I did an initial phone interview with the recruiter, a week later then did an interview on location with 2 employees, one week after that another on location interview was conducted and finally a final interview was conducted via phone with HR. Unfortunately, after the long process and being the prime candidate, the position was put "on hold".