It is not impossible. However, we would advise against it as it can be quite difficult and overwhelming for you. In order to succeed in 42KL, you will have to spend a large part of your time at the school (during the Piscine more than sixty hours per week, and after that, an average of forty hours per week to progress in the Core Programme at a good pace). Some of our working students have taken a combination of annual/study leaves to undertake the Piscine, and some have joined the Piscine when they have more free time i.e. semester break. Ultimately, it is down to you to manage your time well and take charge of your own learning.