A master thesis project can be conducted in collaboration with a company. Such a collaboration is different from the internship that implies working during 9 weeks in the company. These two activities, even if conducted with the same company, always lead to two different evaluation procedures. More details can be found on the internship pages.
Important: a master thesis project is always (co-)supervised by an EPL professor who is in charge of the evaluation and follow-up of the work, even in case of a collaboration with a company. If you wish to work with a company, it is important to find an EPL professor who agrees to supervise your work.